In the Assignment 3
try to play with Lights for the house and shadows for the Rook
also make sure you pay attention where the light comes from the shadows go to the right, but on the left you can see a forest that throws no shadow
the idea that you came up with is not bad, I like it but the lights and shadows make you feel that it is wrong
Did you happen to work 3 before 2?
because the 2 is impressive, you managed to imitate the colors quite well in my opinion, you only have to use those same tools in 3
one last thing that I just thought, try to invert the house so that it looks towards the other side