By Bogdan Coroi
#252584
Emitters applied per geometry faces used to give bad results, so now MXCL tries to prevent that by giving you that error. When using emitters, apply the material per object, not per face.
By giacob
#252592
ok thanks

Hi, in the R21 version of Cinema 4D, the viewport […]

Thanks a lot for your response, I will update and […]

did you tried luxCore?

ok thanks for explaining. actually I do copy the T[…]