I checked the help, and some threads, but apparently, the clipping plane also chops the ground plane for some reason, revealing the environment map in: 7.11.21293.9001, 2021-10-20
I understand that it’s been a tricky to get going with a realtime raytracer, but, well, not chopping the ground plane might make it run faster.
Here it is in Raytraced:
This is the plane in Ghosted:
Thanks for looking.

