I have a scene using SunSky with FG - and a window with a Portal Light on it.
There is a wardrobe with a mirror on it in the scene. If I render in front of the Portal Light the mirror reflects as it should but if I render behind the Portal Light the mirror shows the reflection of the SunSky.
I tried upping the FG Trace Rays and the Raytracing Rays in render settings but it didn’t make any difference.
Also, I’d like to make the ceiling transparent so the camera can look into the scene, but I only want the SunSky light to come through the window.