NURBS patches

[playmesumch00ns]

A NURBS surface is essentially just a flat sheet of paper rolled up in funky ways. As such there are many shapes you can't model with a single surface. Patches let you model complicated shapes with a bundle of smaller surfaces. Only trouble is you got to deal with tangency problems etc etc, not to mention texturing each individual patch!

Another good thing about patches is you can have the lower half and upper half of a face as different patches and do the blend shapes seperately and so on and so forth

[mabuffaloe]

ok, so what about if you use multiple NURBS surfaces instead of patches? would that be any different? thanks for the reply. playmesumch00ns!

Also, if you used projection maps to texture, would the individual patches matter?

[playmesumch00ns]

Multiple patches are essentially just multiple NURBS surfaces, all that happens is that the software tries to make sure there are no visible seams between them when rendering. And no, it wouldn't matter if you were using a projection texture, that would work just the same

[mabuffaloe]

so if you were to render a scene with NURBS surfaces and couldn't see any seams, then there would be no reason to convert to patches?

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