hey guys i found a lot of UV problem post and was surprised not to find mine in there? i thought i was dealing with a hard-headed bug…?
anyway I’m having a problem using my unwraps i did in 3ds max (2010 to 2012) in zbush… zbrush always distorts my uv’s in a way that i get overlaps, while my uv is fine if i render it in max?
any idea why it’s doing that?
here’s a pic
What appears to be happening here is that you have UV’s that are exactly on the line between UV regions. The problem is that programs don’t necessarily register the 0,0 origin exactly the same. As a result, when points are so close to the edges, they can end up being misread as being on the opposite side of the UV space.
For example, something at 0,20 could be misread as 100,20. This has the effect of pulling the associated polygon across the model and creating all sorts of unpleasant effects.
The bottom line is that if you’re planning to take models between programs you should always lay the UV’s out with a bit of a buffer zone around the edges of the UV space. This will ensure that points can’t get misread if the 0,0 origin doesn’t match up.
If that’s all I’m sheiting my pants! 
I’ve been working around this in an annoying way so it would be nice if that’s the solution, will try it out tomorrow.
thx!