I’ve been working on this for hours since yesterday and I’ve still come to no solution, so I’m left with asking for help
I’m working on a house/architecture and I have a main room and two rooms with limited lighting (one with no windows and a doorway, the other with a closed door and a window opposite of the sun direction).
When using a directional light, all three rooms receive lighting (meaning through the walls, not bounced or under any cracks). After doing some tests.
To verify it’s not a mesh/uv/etc problem, I used BSP and default spheres with multiple materials to test the lighting. I attached 3 images showing the light problem. Also, spotlights will bounce light through objects/walls but not with BSP (spotlights; directional lights mess up everywhere).
With VXGI disabled:
With VXGI enabled:
With VXGI enabled and directional light:
This is inside a room composed of 1 additive BSP, 1 subtractive BSP, 3 spheres, 1 spotlight.
Rotating the directional light changes the light in the room but obviously that shouldn’t happen since there’s no space for it to enter. There are no backfaces obscured from viewer (there are the six faces inside the room and six opposite faces around it)
Is there something I’m missing, or are these just issues with VXGI that require numerous cheats to avoid, such as multiple processing volume changes and faked lighting and etc?