Dear Team
when i baked a model (render to texture operation) unwrap it correctly i have no problem with the TANGENT CALCULATION use during the deferred process.
But i use a model simply textured without baking i have an error using the tangent .
Sure the data are not present and my question is why…i use the channel 1.
May you tell us what are the requirement to get the tangente and binormal ?
kind regards
david
The solution is to export on channel 0 and it works, i am blind or it s not in the doc 
