I have a custom material I set up in AC10 that renders pure black using LightWorks in AC11. Color and texture are OK in OpenGL.
The problem: the name of the file that contains the texture was 29 characters. Apparently this is OK for both OpenGL and LightWorks in AC10, but in AC11 it is not OK for LightWorks. The material came out as a black hole on my rendering, and when I opened the material settings dialog, I couldn't put the filename for the material into LightWorks, even though it is still OK in OpenGL.
When I renamed the texture file and re-loaded the library I was able to revise the material setting to use the texture in both OpenGL and LightWorks.
R Muller
AC 28 USA (20+ years on ArchiCAD)
MBP 64GB Apple M1 Max OS 15 Sequoia