Here you can see the types of simulated cells
The simulations of the luminance and color systems share this architecture. In the color simulation there are 3 (coincident) types of photoreceptors, and there are more layers of cells representing the variety of color channels.
Photoreceptors connect to a single horizontal cell. The bipolar cells compute the rectified difference between a photoreceptor and the horizontal cell. The ganglion cells turn the bipolar cell activity into spikes.
Only the luminance simulation has models of cortical cells.