As with cdderivedmesh, performance here is still CPU-limited if material needs tangents/UVs/vcolors. Draw calls have much less overhead though. Also, as with derivedmesh, kept an exception for old drawing for NVIDIA +OSX+VBO off or setDrawOptions callback not being NULL. setDrawOptions should be ommitable and fully VBOfialbe (?) in the future, usually those just check for hidden flag of poly or similar.