Strange. I have the latest product updates. Max 2012, PU 12.
Sending a scene makes no sense since it happens also in a fresh scene without any content.
Reproducible here with:
- choose Corona as render engine (and matedit)
- assign CoronaMtl to a slot
- assign Camera Map Per Pixel to a map slot
> crash
What's strange, it does NOT happen when I do this with a Standard Material, even when it's previewed in the classic matedit with Corona as the matedit renderer.