uv interpolation at rendertime

[milkman]

hello,

is there a way to tell a mentalRay subd approximation to smooth the uvs at rendertime ?
In prman I can define if I want to keep linear uvs, catmull clark smoothed uvs or cc smoothed uvd with pinned border edges when rendering a subdiv surface.
I`m looking for this functionallity in mental ray. Any help really appreciated. thanks !

[milkman]

can anyone please help on this ?
is smoothing UVs at rendertime possible in mentalRay ?

I`m running maya 7 and couldn`t find anything related to to.
thanks !

[haggi]

Well, to me it looks as if uv's are smoothed if I use a subdiv approximation node.

[milkman]

Hi Haggi,

Thanks for your reply.
Do you know if there is a way to preview the smoothed uvs, so textures can be painted to the correct uv space ?
Maya`s polySmooth could be a rough guide but compared to catmullClark smoothing it behaves quite different.

I`m also wondering if it`s possible to turn UV smoothing on/off or even define the way they get smoothed.
As I mentioned above, prman keeps UVs linear by default but offers the ability to smooth the UV tile interior or interior and borders.

[mattMR]

Hi,

a simple idea... use a black color shader + contour shader to view the mesh... and bake it at file... to have the smooth uv from the approximation editor... I think it's a way to have the uvs from the approximation... but it's just an idea

Matt