I’m just working on a new scene trying the Projection painting feature in 2.49b version but I’m having some problems:
The textures are for a small stone (picture 1) but using two different UV coordinate sets (picture 2) and cloning from one layer to the other there is always a line of 1 or 2 pixels on the seams that the projection paint fails to fix (picture 4).
What am i missing? Is there a way to fix that?
P.S. But cloning from a layer on itself paints in the right way over the seams.
its the seam. Projection painting cannot solve that. the seam is the perimeter of the two UV island that are disconnected. It’s best to hide the seam on the underside of the rock.
Garfield, Pananag, if you are using projection painting try increasing the bleeding value of the brush. You should also make sure that you don´t have the subsurf UV option in the subsurf modifier, cause that would alter the UVs and you would have the problem we are talking about.
Another good tip is to enable the snap to pixel option in the Uv/Image Editor, and move the Uvs a little bit. Besides that, it is always a good idea to place the Uvs polygons in a vertical or horizontal way. Diagonal polygons tend to produce innaccuracy, as the borders of the polygons cannot be placed in an exact pixel location.
jpbouza - the bleeding value in this case doesn’t modify the result.
But the effect of the artifact is lessened if I rotate the second UV set of 90 degree to the right (so there are few transformations to apply from one layer to the other) and straightening a bit the Uv polygons. Still there but less noticiable.
One thing I have done, which isn’t great but helps, is to unwrap without any seams so that the faces all lie on top of each other. The result is that some edges (where the UV folds over) are mirrored. Once you subsurf and add directional lighting its not so noticeable. FWIW.
