When I create an object on the ground to investigate shading, why is it apparently always 100% in shade and its shading mask completely black?
When you create an object in Ecotect, it tries to be a bit intuitive in working out what you intended. If you create a planar surface on the ground plane, Ecotect assumes that you want this to be a floor beneath other geometry. Thus it assigns it as a FLOOR object with it’s surface normal facing downwards. As a result, it will always be in shade as it faces the ground.