%\newlength{\layer}
%\newlength{\layerheight}
%\newlength{\perspective}
%\newlength{\filters}
%\newlength{\unit}
\newlength{\upperlevel}
\newlength{\bottomlevel}
\newlength{\concatheight}

\setlength{\layer}{3cm}
\setlength{\layerheight}{3cm}
\setlength{\perspective}{1cm}
\setlength{\filters}{0.01cm}
\setlength{\unit}{0.225cm}
\setlength{\upperlevel}{2.25cm}
\setlength{\bottomlevel}{-2.25cm}
\setlength{\concatheight}{0cm}

\usetikzlibrary{decorations.pathreplacing}

\begin{tikzpicture}

% input layer
\filldraw[fill=cyan!20, draw=black, fill opacity=0.5] (1cm, 0cm) -- (1cm + \perspective, \perspective) -- (1cm + \perspective, \perspective + \layerheight) -- (1cm, \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (1cm, \layerheight) {$1 @ 12 \times 15$};
\node[anchor=north west, scale=0.65] at (1cm, 0cm) {input layer};

% first layer
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \upperlevel) -- (\layer + 32 * \filters, \upperlevel) -- (\layer + 32 * \filters + \perspective, \upperlevel + \perspective) -- (\layer + \perspective, \upperlevel + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (\layer + \perspective, \upperlevel + \perspective) -- (\layer + 32 * \filters + \perspective, \upperlevel + \perspective) -- (\layer + 32 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (\layer + \perspective, \upperlevel + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \upperlevel) -- (\layer + \perspective, \upperlevel + \perspective) -- (\layer + \perspective, \upperlevel + \perspective + \layerheight) -- (\layer, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \upperlevel) -- (\layer + 32 * \filters, \upperlevel) -- (\layer + 32 * \filters, \upperlevel + \layerheight) -- (\layer, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (\layer + 32 * \filters, \upperlevel) -- (\layer + 32 * \filters + \perspective, \upperlevel + \perspective) -- (\layer + 32 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (\layer + 32 * \filters, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \upperlevel + \layerheight) -- (\layer + 32 * \filters, \upperlevel + \layerheight) -- (\layer + 32 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (\layer + \perspective, \upperlevel + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (\layer, \upperlevel + \layerheight) {$32 @ 12 \times 15$};

\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \bottomlevel) -- (\layer + 32 * \filters, \bottomlevel) -- (\layer + 32 * \filters + \perspective, \bottomlevel + \perspective) -- (\layer + \perspective, \bottomlevel + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (\layer + \perspective, \bottomlevel + \perspective) -- (\layer + 32 * \filters + \perspective, \bottomlevel + \perspective) -- (\layer + 32 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (\layer + \perspective, \bottomlevel + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \bottomlevel) -- (\layer + \perspective, \bottomlevel + \perspective) -- (\layer + \perspective, \bottomlevel + \perspective + \layerheight) -- (\layer, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \bottomlevel) -- (\layer + 32 * \filters, \bottomlevel) -- (\layer + 32 * \filters, \bottomlevel + \layerheight) -- (\layer, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (\layer + 32 * \filters, \bottomlevel) -- (\layer + 32 * \filters + \perspective, \bottomlevel + \perspective) -- (\layer + 32 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (\layer + 32 * \filters, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (\layer, \bottomlevel + \layerheight) -- (\layer + 32 * \filters, \bottomlevel + \layerheight) -- (\layer + 32 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (\layer + \perspective, \bottomlevel + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (\layer, \bottomlevel + \layerheight) {$32 @ 12 \times 15$};

% first concatenation
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (2 * \layer, \concatheight) -- (2 * \layer + 64 * \filters, \concatheight) -- (2 * \layer + 64 * \filters + \perspective, \concatheight + \perspective) -- (2 * \layer + \perspective, \concatheight + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (2 * \layer + \perspective, \concatheight + \perspective) -- (2 * \layer + 64 * \filters + \perspective, \concatheight + \perspective) -- (2 * \layer + 64 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (2 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (2 * \layer, \concatheight) -- (2 * \layer + \perspective, \concatheight + \perspective) -- (2 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- (2 * \layer, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (2 * \layer, \concatheight) -- (2 * \layer + 64 * \filters, \concatheight) -- (2 * \layer + 64 * \filters, \concatheight + \layerheight) -- (2 * \layer, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (2 * \layer + 64 * \filters, \concatheight) -- (2 * \layer + 64 * \filters + \perspective, \concatheight + \perspective) -- (2 * \layer + 64 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (2 * \layer + 64 * \filters, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (2 * \layer, \concatheight + \layerheight) -- (2 * \layer + 64 * \filters, \concatheight + \layerheight) -- (2 * \layer + 64 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (2 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (2 * \layer, \concatheight + \layerheight) {$64 @ 12 \times 15$};

\draw (\layer + 32 * \filters + 1.2 * \perspective, \upperlevel + 0.5 * \layerheight) -- (\layer + 32 * \filters + 1.7 * \perspective, \upperlevel + 0.5 * \layerheight) -- (\layer + 32 * \filters + 1.7 * \perspective, \bottomlevel + 0.5 * \layerheight) -- (\layer + 32 * \filters + 1.2 * \perspective, \bottomlevel + 0.5 * \layerheight);
\filldraw[fill=red!20, draw=black] (\layer + 32 * \filters + 1.7 * \perspective, \concatheight + 0.5 * \layerheight) node[anchor=center, scale=0.8] {$C$} circle (\unit);
\draw[-latex] (\layer + 32 * \filters + 1.7 * \perspective + \unit, \concatheight + 0.5 * \layerheight) -- (\layer + 32 * \filters + 1.7 * \perspective + 3 * \unit, \concatheight + 0.5 * \layerheight);

% second layer
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \upperlevel) -- (3 * \layer + 64 * \filters, \upperlevel) -- (3 * \layer + 64 * \filters + \perspective, \upperlevel + \perspective) -- (3 * \layer + \perspective, \upperlevel + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer + \perspective, \upperlevel + \perspective) -- (3 * \layer + 64 * \filters + \perspective, \upperlevel + \perspective) -- (3 * \layer + 64 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (3 * \layer + \perspective, \upperlevel + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \upperlevel) -- (3 * \layer + \perspective, \upperlevel + \perspective) -- (3 * \layer + \perspective, \upperlevel + \perspective + \layerheight) -- (3 * \layer, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \upperlevel) -- (3 * \layer + 64 * \filters, \upperlevel) -- (3 * \layer + 64 * \filters, \upperlevel + \layerheight) -- (3 * \layer, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer + 64 * \filters, \upperlevel) -- (3 * \layer + 64 * \filters + \perspective, \upperlevel + \perspective) -- (3 * \layer + 64 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (3 * \layer + 64 * \filters, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \upperlevel + \layerheight) -- (3 * \layer + 64 * \filters, \upperlevel + \layerheight) -- (3 * \layer + 64 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (3 * \layer + \perspective, \upperlevel + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (3 * \layer, \upperlevel + \layerheight) {$64 @ 12 \times 15$};

\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \bottomlevel) -- (3 * \layer + 64 * \filters, \bottomlevel) -- (3 * \layer + 64 * \filters + \perspective, \bottomlevel + \perspective) -- (3 * \layer + \perspective, \bottomlevel + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer + \perspective, \bottomlevel + \perspective) -- (3 * \layer + 64 * \filters + \perspective, \bottomlevel + \perspective) -- (3 * \layer + 64 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (3 * \layer + \perspective, \bottomlevel + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \bottomlevel) -- (3 * \layer + \perspective, \bottomlevel + \perspective) -- (3 * \layer + \perspective, \bottomlevel + \perspective + \layerheight) -- (3 * \layer, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \bottomlevel) -- (3 * \layer + 64 * \filters, \bottomlevel) -- (3 * \layer + 64 * \filters, \bottomlevel + \layerheight) -- (3 * \layer, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer + 64 * \filters, \bottomlevel) -- (3 * \layer + 64 * \filters + \perspective, \bottomlevel + \perspective) -- (3 * \layer + 64 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (3 * \layer + 64 * \filters, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (3 * \layer, \bottomlevel + \layerheight) -- (3 * \layer + 64 * \filters, \bottomlevel + \layerheight) -- (3 * \layer + 64 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (3 * \layer + \perspective, \bottomlevel + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (3 * \layer, \bottomlevel + \layerheight) {$64 @ 12 \times 15$};

% second concatenation
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (4 * \layer, \concatheight) -- (4 * \layer + 128 * \filters, \concatheight) -- (4 * \layer + 128 * \filters + \perspective, \concatheight + \perspective) -- (4 * \layer + \perspective, \concatheight + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (4 * \layer + \perspective, \concatheight + \perspective) -- (4 * \layer + 128 * \filters + \perspective, \concatheight + \perspective) -- (4 * \layer + 128 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (4 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (4 * \layer, \concatheight) -- (4 * \layer + \perspective, \concatheight + \perspective) -- (4 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- (4 * \layer, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (4 * \layer, \concatheight) -- (4 * \layer + 128 * \filters, \concatheight) -- (4 * \layer + 128 * \filters, \concatheight + \layerheight) -- (4 * \layer, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (4 * \layer + 128 * \filters, \concatheight) -- (4 * \layer + 128 * \filters + \perspective, \concatheight + \perspective) -- (4 * \layer + 128 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (4 * \layer + 128 * \filters, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (4 * \layer, \concatheight + \layerheight) -- (4 * \layer + 128 * \filters, \concatheight + \layerheight) -- (4 * \layer + 128 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (4 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (4 * \layer, \concatheight + \layerheight) {$128 @ 12 \times 15$};

\draw (3 * \layer + 64 * \filters + 1.1 * \perspective, \upperlevel + 0.5 * \layerheight) -- (3 * \layer + 64 * \filters + 1.6 * \perspective, \upperlevel + 0.5 * \layerheight) -- (3 * \layer + 64 * \filters + 1.6 * \perspective, \bottomlevel + 0.5 * \layerheight) -- (3 * \layer + 64 * \filters + 1.1 * \perspective, \bottomlevel + 0.5 * \layerheight);
\filldraw[fill=red!20, draw=black] (3 * \layer + 64 * \filters + 1.6 * \perspective, \concatheight + 0.5 * \layerheight) node[anchor=center, scale=0.8] {$C$} circle (\unit);
\draw[-latex] (3 * \layer + 64 * \filters + 1.6 * \perspective + \unit, \concatheight + 0.5 * \layerheight) -- (3 * \layer + 64 * \filters + 1.6 * \perspective + 3 * \unit, \concatheight + 0.5 * \layerheight);

% third layer
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \upperlevel) -- (5 * \layer + 32 * \filters, \upperlevel) -- (5 * \layer + 32 * \filters + \perspective, \upperlevel + \perspective) -- (5 * \layer + \perspective, \upperlevel + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer + \perspective, \upperlevel + \perspective) -- (5 * \layer + 32 * \filters + \perspective, \upperlevel + \perspective) -- (5 * \layer + 32 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (5 * \layer + \perspective, \upperlevel + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \upperlevel) -- (5 * \layer + \perspective, \upperlevel + \perspective) -- (5 * \layer + \perspective, \upperlevel + \perspective + \layerheight) -- (5 * \layer, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \upperlevel) -- (5 * \layer + 32 * \filters, \upperlevel) -- (5 * \layer + 32 * \filters, \upperlevel + \layerheight) -- (5 * \layer, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer + 32 * \filters, \upperlevel) -- (5 * \layer + 32 * \filters + \perspective, \upperlevel + \perspective) -- (5 * \layer + 32 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (5 * \layer + 32 * \filters, \upperlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \upperlevel + \layerheight) -- (5 * \layer + 32 * \filters, \upperlevel + \layerheight) -- (5 * \layer + 32 * \filters + \perspective, \upperlevel + \perspective + \layerheight) -- (5 * \layer + \perspective, \upperlevel + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (5 * \layer, \upperlevel + \layerheight) {$32 @ 12 \times 15$};

\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \bottomlevel) -- (5 * \layer + 32 * \filters, \bottomlevel) -- (5 * \layer + 32 * \filters + \perspective, \bottomlevel + \perspective) -- (5 * \layer + \perspective, \bottomlevel + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer + \perspective, \bottomlevel + \perspective) -- (5 * \layer + 32 * \filters + \perspective, \bottomlevel + \perspective) -- (5 * \layer + 32 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (5 * \layer + \perspective, \bottomlevel + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \bottomlevel) -- (5 * \layer + \perspective, \bottomlevel + \perspective) -- (5 * \layer + \perspective, \bottomlevel + \perspective + \layerheight) -- (5 * \layer, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \bottomlevel) -- (5 * \layer + 32 * \filters, \bottomlevel) -- (5 * \layer + 32 * \filters, \bottomlevel + \layerheight) -- (5 * \layer, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer + 32 * \filters, \bottomlevel) -- (5 * \layer + 32 * \filters + \perspective, \bottomlevel + \perspective) -- (5 * \layer + 32 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (5 * \layer + 32 * \filters, \bottomlevel + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (5 * \layer, \bottomlevel + \layerheight) -- (5 * \layer + 32 * \filters, \bottomlevel + \layerheight) -- (5 * \layer + 32 * \filters + \perspective, \bottomlevel + \perspective + \layerheight) -- (5 * \layer + \perspective, \bottomlevel + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (5 * \layer, \bottomlevel + \layerheight) {$32 @ 12 \times 15$};

% third concatenation
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (6 * \layer, \concatheight) -- (6 * \layer + 64 * \filters, \concatheight) -- (6 * \layer + 64 * \filters + \perspective, \concatheight + \perspective) -- (6 * \layer + \perspective, \concatheight + \perspective) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (6 * \layer + \perspective, \concatheight + \perspective) -- (6 * \layer + 64 * \filters + \perspective, \concatheight + \perspective) -- (6 * \layer + 64 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (6 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- cycle;
\filldraw[dashed, fill=orange!20, draw=black, fill opacity=0.5] (6 * \layer, \concatheight) -- (6 * \layer + \perspective, \concatheight + \perspective) -- (6 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- (6 * \layer, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (6 * \layer, \concatheight) -- (6 * \layer + 64 * \filters, \concatheight) -- (6 * \layer + 64 * \filters, \concatheight + \layerheight) -- (6 * \layer, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (6 * \layer + 64 * \filters, \concatheight) -- (6 * \layer + 64 * \filters + \perspective, \concatheight + \perspective) -- (6 * \layer + 64 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (6 * \layer + 64 * \filters, \concatheight + \layerheight) -- cycle;
\filldraw[thick, fill=orange!20, draw=black, fill opacity=0.5] (6 * \layer, \concatheight + \layerheight) -- (6 * \layer + 64 * \filters, \concatheight + \layerheight) -- (6 * \layer + 64 * \filters + \perspective, \concatheight + \perspective + \layerheight) -- (6 * \layer + \perspective, \concatheight + \perspective + \layerheight) -- cycle;
\node[anchor=south west, scale=0.65, rotate=45] at (6 * \layer, \concatheight + \layerheight) {$64 @ 12 \times 15$};

\draw (5 * \layer + 32 * \filters + 1.2 * \perspective, \upperlevel + 0.5 * \layerheight) -- (5 * \layer + 32 * \filters + 1.7 * \perspective, \upperlevel + 0.5 * \layerheight) -- (5 * \layer + 32 * \filters + 1.7 * \perspective, \bottomlevel + 0.5 * \layerheight) -- (5 * \layer + 32 * \filters + 1.2 * \perspective, \bottomlevel + 0.5 * \layerheight);
\filldraw[fill=red!20, draw=black] (5 * \layer + 32 * \filters + 1.7 * \perspective, \concatheight + 0.5 * \layerheight) node[anchor=center, scale=0.8] {$C$} circle (\unit);
\draw[-latex] (5 * \layer + 32 * \filters + 1.7 * \perspective + \unit, \concatheight + 0.5 * \layerheight) -- (5 * \layer + 32 * \filters + 1.7 * \perspective + 3 * \unit, \concatheight + 0.5 * \layerheight);

% flatten layer
\foreach \x in {0,...,4} {
	\filldraw[fill=cyan!10, draw=black] (6 * \layer + 3cm, \concatheight + \unit +  0.75  * \x cm) circle (\unit);
	\draw (6 * \layer + 3cm + \unit, \concatheight + \unit +  0.75  * \x cm) -- (7 * \layer + 2cm - \unit, \concatheight + \unit + 0.5 * \layerheight);
};
\node[anchor=north, scale=0.5, below=15pt, align=center] at (6 * \layer + 3cm, \concatheight + \unit) {flatten};

% draw the "flatenisation"
\draw[dashed] (6 * \layer + 64 * \filters, \layerheight) -- (6 * \layer + 3 cm, 3cm + 2 * \unit) -- (6 * \layer + 64 * \filters + \perspective, \layerheight + \perspective) -- cycle;
\draw[dashed] (6 * \layer + 64 * \filters, 0cm) -- (6 * \layer + 3 cm, 0cm) -- (6 * \layer + 64 * \filters + \perspective, \perspective) -- cycle;

% output layer
\filldraw[fill=cyan!10, draw=black] (7 * \layer + 2cm, \concatheight + \unit + 0.5 * \layerheight - \unit) -- (7 * \layer + 2cm, \concatheight + \unit + 0.5 * \layerheight) circle (\unit) -- (7 * \layer + 2cm, \concatheight + \unit + 0.5 * \layerheight + \unit);
\draw (7 * \layer + 2cm + 0.05cm, \concatheight + \unit + 0.5 * \layerheight) node[anchor=north, below=10pt, text width=2cm, scale=0.35, align=center] {output layer [1 unit]} -- (7 * \layer + 2cm + 0.10cm, \concatheight + \unit + 0.5 * \layerheight) -- (7 * \layer + 2cm + 0.15cm, \concatheight + \unit + 0.5 * \layerheight + 0.05cm);

% draw the first convolution
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, 0.9 * \layerheight) -- (1cm + \perspective, 0.9 * \layerheight + \perspective) -- (1cm + \perspective, \layerheight + \perspective) -- (1cm, \layerheight) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, 0.9 * \layerheight) -- (\layer, \upperlevel + 0.9 * \layerheight) -- (1cm + \perspective, 0.9 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, \layerheight) -- (\layer, \upperlevel + 0.9 * \layerheight) -- (1cm + \perspective, \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm + \perspective, 0.9 * \layerheight + \perspective) -- (\layer, \upperlevel + 0.9 * \layerheight) -- (1cm + \perspective, \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, 0.9 * \layerheight) -- (\layer, \upperlevel + 0.9 * \layerheight) -- (1cm, \layerheight) -- cycle;

\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, 0cm) -- (1cm + 0.2 * \perspective, 0.2 * \perspective) -- (1cm + 0.2 * \perspective, \layerheight + 0.2 * \perspective) -- (1cm, \layerheight) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, 0cm) -- (\layer, \bottomlevel + 0.9 * \layerheight) -- (1cm + 0.2 * \perspective, 0.2 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm + 0.2 * \perspective, 0.2 * \perspective) -- (\layer, \bottomlevel + 0.9 * \layerheight) -- (1cm + 0.2 * \perspective, \layerheight + 0.2 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm + 0.2 * \perspective, \layerheight + 0.2 * \perspective) -- (\layer, \bottomlevel + 0.9 * \layerheight) -- (1cm, \layerheight) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (1cm, 0cm) -- (\layer, \bottomlevel + 0.9 * \layerheight) -- (1cm, \layerheight) -- cycle;

% draw the second convolution
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.4 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- (2 * \layer + 64 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- (2 * \layer + 64 * \filters, 0.5 * \layerheight) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.4 * \layerheight) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.5 * \layerheight) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.4 * \layerheight) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters, 0.5 * \layerheight) -- cycle;

\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- (2 * \layer + 64 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (3 * \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- (3 *  \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- (3 * \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (3 * \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;

% draw the second convolution
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.4 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- (2 * \layer + 64 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- (2 * \layer + 64 * \filters, 0.5 * \layerheight) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.4 * \layerheight) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.5 * \layerheight) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters, 0.4 * \layerheight) -- (3 * \layer, \upperlevel + 0.6 * \layerheight) -- (2 * \layer + 64 * \filters, 0.5 * \layerheight) -- cycle;

\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- (2 * \layer + 64 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (3 * \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- (3 *  \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- (3 * \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (2 * \layer + 64 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (3 * \layer, \bottomlevel + 0.9 * \layerheight) -- (2 * \layer + 64 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;

% draw the third convolution
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters, 0.4 * \layerheight) -- (4 * \layer + 128 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- (4 * \layer + 128 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- (4 * \layer + 128 * \filters, 0.5 * \layerheight) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters, 0.4 * \layerheight) -- (5 * \layer, \upperlevel + 0.6 * \layerheight) -- (4 * \layer + 128 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters, 0.5 * \layerheight) -- (5 * \layer, \upperlevel + 0.6 * \layerheight) -- (4 * \layer + 128 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters + \perspective, 0.4 * \layerheight + \perspective) -- (5 * \layer, \upperlevel + 0.6 * \layerheight) -- (4 * \layer + 128 * \filters + \perspective, 0.5 * \layerheight + \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters, 0.4 * \layerheight) -- (5 * \layer, \upperlevel + 0.6 * \layerheight) -- (4 * \layer + 128 * \filters, 0.5 * \layerheight) -- cycle;

\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (4 * \layer + 128 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- (4 * \layer + 128 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- (4 * \layer + 128 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (5 * \layer, \bottomlevel + 0.9 * \layerheight) -- (4 * \layer + 128 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters + 0.4 * \perspective, 0.4 * \perspective) -- (5 *  \layer, \bottomlevel + 0.9 * \layerheight) -- (4 * \layer + 128 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters + 0.4 * \perspective, \layerheight + 0.4 * \perspective) -- (5 * \layer, \bottomlevel + 0.9 * \layerheight) -- (4 * \layer + 128 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;
\filldraw[fill=red!50, draw=black, fill opacity=0.2] (4 * \layer + 128 * \filters + 0.3 * \perspective, 0.3 * \perspective) -- (5 * \layer, \bottomlevel + 0.9 * \layerheight) -- (4 * \layer + 128 * \filters + 0.3 * \perspective, \layerheight + 0.3 * \perspective) -- cycle;

% hidden layer labels
\draw[decorate, decoration={brace}] (\layer, \upperlevel + 1.25 * \layerheight + \perspective) -- (2 * \layer + 64  * \filters + \perspective, \upperlevel + 1.25 * \layerheight + \perspective)  node[midway, anchor=south, above=2cm, align=center] {concatenation module 1} node[midway, anchor=south, above=0.8cm, align=center, text width=4cm] {hor: $1 \times 15$ kernel ver: $12 \times 1$ kernel} node[midway, anchor=south] {(ReLU activation)};
\draw[decorate, decoration={brace}] (3 * \layer, \upperlevel + 1.25 * \layerheight + \perspective) -- (4 * \layer + 128  * \filters + \perspective, \upperlevel + 1.25 * \layerheight + \perspective)  node[midway, anchor=south, above=2cm, align=center] {concatenation module 2} node[midway, anchor=south, above=0.8cm, align=center, text width=4cm] {hor: $1 \times 15$ kernel ver: $12 \times 1$ kernel} node[midway, anchor=south] {(ReLU activation)};
\draw[decorate, decoration={brace}] (5 * \layer, \upperlevel + 1.25 * \layerheight + \perspective) -- (6  * \layer + 64  * \filters + \perspective, \upperlevel + 1.25 * \layerheight + \perspective)  node[midway, anchor=south, above=2cm, align=center] {concatenation module 3} node[midway, anchor=south, above=0.8cm, align=center, text width=4cm] {hor: $1 \times 15$ kernel ver: $12 \times 1$ kernel} node[midway, anchor=south] {(ReLU activation)};


\end{tikzpicture}

% vim: ft=tex