Shadows on maps

it seems to be an issue with shadows, sliding on baked maps, as in the following details; they come out very hard and dark. Dunno if it’s a matter of camera point of view or bad uv mapping

another sample: the grazing hard shadow on the wall fades away after rotating the camera

Does the material on the wall have bump mapping?

Hi Nicola,
I solved the issue by importing in 3ds format without having any mapping problem; if you import in obj, dae or fbx the hard shadow may randomly appear again