Possible issues with Shadow Maps

Receive Shadows flag

With FGI Shadow Maps, you cannot select which objects receive shadows. Therefore, the "receive shadows" flags are not used while applying FGI shadow maps.

Discontinuity errors

Due to the shader's limited precision to make it run fast, some issues can arise where the lighting/shadowing gives the wrong result between geometry discontinuities. For example:

• Left image: The error is emphasized by the blurring.

• Middle image: The error is just barely visible.

• Right image: The error can be mitigated (but not completely avoided) by disabling the excludeBackFaces parameter.

The solution is to tune the Shadow Maps parameters case-by-case.