GBuffer issue on AMD GPU

[skaarj1989]

In the GBuffer pass, a vertex shader does not write to fragPos and normal/TBN (to fragment shader).

This results in no lighting (the final image is black).

The same VAO, vertex shader and very similar fragment shader are used in the ReflectiveShadowMap pass with correct output.

This problem happens on AMD only, works fine with:

• Intel HD Graphics 530 (30.0.101.1994)
• NVIDIA GTX960 (30.0.14.7333)