I have imported a animated scene from another application. (the meshes, quaternions, and positions). But the Z axis are flipped. I have to make a scale(1,1,-1). The problem is my normals are now wrong thus making the lighting inverted too.
What's the best strategy to solve this problem ?
(I thought chaging the up in my camera but then I need to invert the Z position of all the other objects)
Best regards and thank you for your help,
Guillaume Leclerc