CGTalk - Patch Model texture

giodoc

11-02-2004, 12:00 AM

Hi All,

I'm pretty new at CG, been at it for around 6+ months or so....So bear with me..

I've created a nurbs based patch model of a head in Maya and would like to know the best way to go about texturing it in terms of workflow and technique.

I saw a tutorial where the 3d texture paint tool was used to color code the patches and then textures were created for each patch in photoshop. And everything was "put back" using switches in the hypershade...

Now the question I have is. if you are texturing skin, you have diffent levels of bump, translucency etc on different areas, so when you do create the textures based on color coding the patches as per the method above, then reassign them to the surface, wont there be visible breaks where the texture borders? Also it seems pretty unintuitive to create separate pieces of the texture then expect it all to mesh together seamlessly? I can see how this works with UV maps for polys as the texture can be fitted to the unwrapped UVs, but in the nurbsexample above you're basically working with a square texture per patch...

Can anyone suggest an approach/methodology that they might have used to tackle this issue?

Thanks in advance for any help that can be offered by you experts

Talisen

11-03-2004, 05:54 PM

Generally, when working with nurbs patches you try and rebuild and attach the patches in the face. Work around the face to get any seams into places they where they won't be easily observed. This creates a single surface which you can texture without worrying about variations. Seams can then be stitched to provide surface continuity for animation or deformations.

giodoc

11-03-2004, 07:43 PM

Hi Talisen,

Thanks for your reply. I have basically one through the attach. detach, rebuild process on the model, and there is a fair amount of continuity. However, the model is split into around 12 patches, 6 for each side.

What I need to know is:

The process of setting up the texture, ie, how do you go about setting up things like the color, bump, translucency maps....Is it done on a patch basis, if so, is there a particular startegy to go about doing this.
Could I use photoshop to do this kind of thing, ie create 1 large map for the face then somehow break it up, or is it best done in a 3d paint programme?
Thanks in advance for any suggestions that you can offer.

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