Distorted UVs within single face in Maya

Defonten

Help,

Here's two examples of what I mean. See that visible break in checker texture going diagonally from one corner to another?

And on another example two straight lines (texture) are distorted awfully within a single face boundaries.. Of course I could fix this by supporting those texture lines adding extra edges right on them but that would increase poly count and would.. umm uglify my clean mesh.

How could I possibly fix this?! Thanks!

throttlekitty

If you could post a picture of your UV layout that would be great.

Defonten

Here you go. The first one is UV layout fragment and the last is that same part of the model. Thanks!

CreativeSheep

I spent a great deal into the technical side of UV mapping, as I am slowly with rigging and rendering, it can only help to have a stronger sense of your tools

Can you show a few more images, of your painted maps and UV's ?

rollin

distortion should not occur on one triangle. on one quad distortion is not uncommon if your uv's don't resemble the exact relative uv positions

I don't see something special here

Bartalon

To expand on what rollin said:

The distortion is probably due to that polygon being a perfect rectangle, but the UVs for it are part of a UV island it in such a way where it is forced into being slightly trapezoidal. This is pretty common with cylindrical shapes whose UV shells you want to keep connected.

If perhaps you triangulate that quad and flip the triangle edge, it may help but not resolve the issue. If you want a perfectly undistorted UV for that section then you will have to separate the entire ring of polygons and lay it out as a horizontal strip (with a seam on one edge) rather than a continuous circle (which causes bending and therefore non-rectangular shapes).

tharle

you often get shearing along the triangle edges of long thin quads - add some more edge loops so the faces are more square and it should fix it.