- vec3 world_tangent = normal_tf*tangent;
- vec3 world_binormal = cross(world_normal, world_tangent);
- out mat3 world_tbn_matrix = mat3(world_tangent, world_binormal, world_normal);
+ if(use_normal_map)
+ {
+ vec3 world_tangent = normal_tf*tangent;
+ vec3 world_binormal = cross(world_normal, world_tangent);
+ out mat3 world_tbn_matrix = mat3(world_tangent, world_binormal, world_normal);
+ }