I agree completely. I think the default of 2 might have been set by someone who didn't take mip levels into account. To be honest I generally use 32 or 64 as margin depending on texture size (larger texture means more mips).
But I suppose 16 as default which I think is also what it is in xNormal seems reasonable. At the very least I'll echo that 2 is no good :) The background color will bleed into the subsequent mip levels too quickly. Cheers, Morten. On Fri, Feb 22, 2013 at 9:18 PM, metalliandy <metalliandy...@googlemail.com>wrote: > Hey everyone, > > I want to propose a change the default margin value that is currently > used when baking textures. > > The current margin of 2px is no where near enough and really doesn't > help anyone due to the fact that it only is enough for the initial baked > texture and not for any further mip levels that may be needed. As I'm > sure some of you may be aware, you need at least 1px of margin per UV > island to be correct for each mip map level as the texture is resized > down, in order to stop the background colour from bleeding into the UV > islands. > I would recommend using a value of 16px as the new default as this would > allow for 3 mip levels in addition to the initial bake, as long as the > background colour is correct) which should be enough in most cases as > the texture is resized down (16px>8px>4px>2px). > Ideally of course we would set the margin so high that there is actually > no background colour, but I don't think that many people would go for > that as some feel that it makes the texture look messy, however > irrelevant this may be, some people do care about how their textures > look even if you will never see margin on the final mesh. ;) > > Please take a look at the link below for an example of what an incorrect > margin value can look like when viewed on your mesh. > > http://blenderartists.org/forum/showthread.php?279870-seams-artifacts-with-tangent-normal-map-in-blender-and-unity > > For clarification, this is applicable to all baked textures, not just > normal maps > > > Cheers, > > -Andy > _______________________________________________ > Bf-committers mailing list > Bf-committers@blender.org > http://lists.blender.org/mailman/listinfo/bf-committers > _______________________________________________ Bf-committers mailing list Bf-committers@blender.org http://lists.blender.org/mailman/listinfo/bf-committers