No I meant the direction normals of the polygons in the model itself not a second normal map. If a polygon normal is misaligned or flipped, the polygon does not draw textures and light correctly. If it's flipped, you get what looks like invisible spots on the mesh.


I'd still think it's because you don't have 2 sided turn on or e.g. backface-culling turned off.
Are your leaves just plains with a alpha texture?

ED-- I'll look at it now.