Are lightwave subpatches bezier patches, or ... ? in the sdk they say it''s undocumented. Does this mean they invented their own patch type?

Don''t really know. The answer is part of their proprietary software and if its undocumented, the only way you can get an answer, most likely, is to ask them. Maybe send an email to their tech support?

Graham Rhodes
Senior Scientist
Applied Research Associates, Inc.

I think I read somewhere that they use "b-splines", which are not the same as beziers. I''m not 100% sure though.