When I produce a texture on a model normally it produces a correct gutter, there is a gradient sampling from the edge of each island to the island next to it. If I cut that model into section, re-unwrap and try to do a texture reprojection I get errors in the gutters, I get random color samplings that do not match the islands. This causes the edges of the polygons to be visible when mipmapping and is especially problematic in a game engine.