Render-to-texture between two projections 2005-03-01 - By peterb
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> Without having gone through all of your explanations/suggestions
> (thanks!) yet, here's another explanation for clarity:
>
> Imagine an object with two different UV layouts/projections. A texture
> artist did a color map for UV layout A. Now for whatever reason (I
> have a good one, but it's complicated) I need to use UV layout B
> instead,
dont worry, I can think of a few. This is a normal situation.
And its one of the purposes that rendermap was designed for.
> but the color map was made for A and doesn't match that
> contours of B. I really don't want to refit the texture in Photoshop
> as it's time-consuming and not exact - instead I want to render out
> the new color map by putting both projections on the same object and
> transferring the pixels from A to B.
>
> I've been using this workflow quite a bit in Maya, but now I'm looking
> for a way to make it happen in XSI.
>
as said in the first mail,
in the rendertree put your painted texture, with the UV layout A in the
color input of a constant shader in the material for the object.
apply a rendermap, select the UV layout B, choose a proper name, path,...
for your renderer texture. Try to render (regenerate maps) small at first
(256 pixels or so) to see if it looks fine. Then play around with the
resolution and sampling to get a good quality, and regenerate.
The quickest to test if it works, is to go to the rendertree, load in the
newly generated texture, choose the UVset B and assign this to the color
input of the constant material.
It should be a perfect fit.
But if you wanna switch back and forth between the original and the result,
its often easier to organise this using passes, and a material assigned to a
partition containing the object.
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