I have hand drawn isometric background looked at about 35-40 degrees.
How to set walkable areas at such image?
Is it possible to use a black ("not white") and white color map sketch and set white areas to be walkable?
Or is there some other way to do it easily?
On this image, black areas represent walls at some height seen at some angle.
I also have more complex maze-like dungeon drawn:
I have searched quite some time but didn't find some satisfactory answer specific to my need.