Here is the reworked version of the painting I posted earlier today.

Reworked shadow area

I washed out the opaque, dark cast shadow and painted in a bit of fresh color.  I then added a bit of pastel to bring light back into the brambles.  A shadow should look cast upon a surface, not painted onto a surface.  Since the local color value of the building is light, the cast shadow must not fall more than two steps away from the value of the sunlit surface of the building.