If I have a flat plane with 4 vertices and 2 sides, then uv map it and have tga textures each side. The normals are output as 0,0,0 which makes the textures not display.
I can upload an example if required.
Any comment dgud? Have you been able to replicate this?
I can take a look on this and l would prefer to use example yours. Could you please link it?
The normal for a vertex is the average between the faces it is connected to,
one face normal points at Z and the other face -Z thus the vertex normal is 0,0,0.
What to you want it to be?
Not a bug, it works fine if you set the edges to hard which is what I guess you want.