convert ptex to UV map?

#1

is there a way to do this? So far ive struck out with both Mari and Mudbox.

Help would be greatly appreciated :slight_smile:

#2

loading your ptex file in mud and a second mesh with uvs and do a transfer paintlayer should do it…
have you tried that…?

#3

My mesh has tris in it, Mud gives following error: “mud can only import ptex files that have quad meshes”

#4

Try to retopology a model in any software and bake a texture from your model to the new one with uvs

#5

wouldnt retopology totally mess up my ptex texture?

#6

Not at all, Baking ptex to texture this is what i’m talking about an example with 3d coat, but i think you can do the same with maya, 3ds max or any software that support ptex format

#7

stellios you are right… changing the vertex order is also messing up the connection to your ptex file… and mudbox isn able to load ptex files to object with tris, yet…

where did you paint the ptex data…?

#8

I painted the texture in mari originally on a mesh with tri’s. Not something I will do again. What ive had to do is repaint it in mudbox. It appears that ptex might not be totally ready yet

#9

Hi,

Mari supports the full PTex specification which includes triangles. Other applications may have problems with triangles. Sorry that you’ve had problems with Mudbox.

Which renderer are you currently using?

#10

vray, which according to what ive read doesnt support ptex vector displacement so Ive given up already and gone back to UV’s.

#11

Mari 1.4v3 is pretty great with ptex. Not many apps allow you to have non-quads, which is why in general it is good to make sure you are very happy with your topology before you go on to paint.

Another approach you could have taken in Mari was unproject a few views and project them back into the new geometry. It’s a bit manual and requires some care but it would recover most of your work.

Finally, the way i usually do it is by going through renderman and sending the data to point clouds and baking them back to uv’s. That requires a renderman license though.

#12

note:

latest mud version is now able to load ptex files onto meshes with tris and ngons…!

#13

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