Here I am showing PBR raytraced area (rect) light shadows with properly behaving penumbra (bottom image). The shadow penumbra is focused where the shadow begins (at the casting object) and widens (defocuses, blurs, softens) with distance from the shadow casting object. The best I’ve been able to achieve in UE is in the UEarealight image (top image). The penumbra does not sharpen at the shadow-casting object and therefore makes it appear to be floating rather than in contact with the ground, which it is.
Is there a way to force UE to generate more accurate penumbras?
lor