Maya: UV pixelsnap layout

Cronnix

Hi all! Is there any way to automatically make each UV vertice in UVMap to snap to closest grid/pixel? I am making an UVset for a lightmap and would like to avoid having edges going in the middle of a pixel to avoid light seams. As per picture below:
http://i.imgur.com/cFroT.jpg

I can surely do it manually, but would take hell lot of time Or maybe there is any other software that has this function?

oglu

your bake engine should bleed outside of the uv shell so this shouldnt be a problem at all...

Cronnix

oglu wrote: »

your bake engine should bleed outside of the uv shell so this shouldnt be a problem at all...

It becomes a problem when it's a rough mesh with hard edges, so two nearby faces may have significantly different lightning. If that edge, which is shared by both faces gets in the middle of a pixel it would result in some weird bleeding, wouldn't it?

I am using UDK and you can see certain issues (left without lightmass, right with), despite UV shells having enough padding between them.

http://imgur.com/DE5zB

In the end I guess it's not that important, was mostly curious

CheeseOnToast

I don't have maya in front of me right now, but there's an option in the UV editor somewhere to snap UVs to pixel corners or pixel centres. I think it might be "grid UVs". Definitely helpful for low-res lightmaps.