It is very hard - for each application - to calculate light and shadows in runtime. So, we
have decided to create maps, which are projected on walls and floors, before we deliver
Beersokoban to you. On the one hand it increases the performance, on the other hand your 3D
graphics device does not need to calculate the same information again and again.
Below you find two images. On the left side you see an image of Beersokoban with lightmaps,
on the right side without.