Thanks for the clarification, Morten! You are of course 100% correct. :)
-Andy On 10/11/2012 14:10, Morten Mikkelsen wrote: >>> When baking with an all quad mesh, the triangulation that is done >>> internally in Morten's TS might not match the manual triangulation that >>> the user applies on export, which potentially could cause issues because > This is not exactly the issue. Let me clarify. > The mikktspace part is done at quad level if there are quads and will > always give the same > tangent spaces at vertex level no matter what the order of vertices or > faces is. > This is its very strong advantage which other tangent space calculators > can't do. > > After mikktspace has already run the problem occurs at a later stage > because before rendering/baking triangulation has to have been performed. > So the issue is eventhough the tangent spaces at the vertices aren't > impacted by how quads are triangulated (since triangulation happens later) > the interpolated tangent space is heavily impacted by which diagonal is > picked. Similar to how Gouraud shading is heavily impacted by which > diagonal is picked. So eventhough tangent space is consistent at the > vertices you get problems if baker and render don't pick the same > triangulation > due to differences in the interpolated tangent space. > > I should mention I am using "render triangulation" loosely here since it > can happen in a lot of places though for a game it would typically happen > somewhere in the engine's tools pipeline. Anyway the advantage to this > modifier is it enforces a consistent triangulation which will be received > by both baker and renderer (incl. Blender's renderer). Further, this is > achieved without causing permanent triangulation. > It's a sensible practice which is already used by artists in other modeling > products. > > Morten M. > _______________________________________________ > 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