Kupa originally made this statement, but later corrected it. The confusion was that a lot of people equate "Renderman" with the Reyes type subdividing polygon technology used in Pixar's PRMan renderer. What Steve intended to say was that Firefly was to be based on this technology. Renderman Compliance (which is defined by Pixar) actually defines the capabilities of and interface to a rendering engine, not the technology used, and would need to be verified by Pixar through a number of tests before the compliance certificate was awarded. There are a number of renders which are compliant with this standard, scanline engines like PRMan itself of course, but also raytracers such as BMRT. On the whole though, compliance only makes sense for stand alone renderers, for application embedded renderers, such as Firefly compliance would be a waste of effort. Bill