This is not a bug, but just how Stationary lights work versus Movable lights. What you are seeing is expected because you are extremely close to the light source and you seem to be going in and out of the inner radius of the light, which is what provides the stronger darker shadow of the two radii. Keep in mind also that your character has a PhysX cloth coat on, which will cast shadows differently under different lighting conditions if not set up properly. Another thing to keep in mind is to have another light source in your scene somewhere for ambient fill lighting. This helps illuminate really dark areas as well as adding a bit of realism.
If you have any other questions or need additional assistance please let me know.
Thanks for the answer Andrew, but I still got questions about this issue.
( Btw, the screenshot is showing movable light shadow, which is a correct case. The problem is shown in the video )
It occurs to the characters without PhysX cloth on their mesh too, so I guess the reason is independent to the subject primitive’s setting.
As the problem never occurs with the movable light, I guess the shadow projection matrices between stationary light and moveble light are different.
Is this the reason? and why should it be?
I did watch the video which is what my comments were based upon. For some more concrete definitions and differences between the light types, have a read over the ‘Shadow Casting’ documentation. It will provide you with a bit more insight on how they function.
Shadow Casting
If you have any questions after reading over the documentation, please do not hesitate to ask.
