Iv been working on this project for months and have done literally hundreds of bakes with no issues, then yesterday, for no apparent reason the UV Baker started adding a 2…3 pixel wide black line around the texture space islands, and i cannot for the life of me work out why!
before
http://www.tv-consultants.com/OOPz/temp/UVBakeBlackEdge0.jpg
after
http://www.tv-consultants.com/OOPz/temp/UVBakeBlackEdge1.jpg
im trying to re-render sections of the texture (without clearing the whole thing). if i set zero margin, it renders as expected (only the result is unusable due to the messy edges that leaves).
if i set a margin > 0, it adds the margin as it should, then adds another 2…3 pixels around the outside of that like a second margin, only black.
this of course makes a horrible mess, intruding into close sections and making the mipmap versions look horrible
… any ideas?