Hello I have one on the "normal map" "Tangent - Normal - Binormal" "texture reuse" issue. 1. Models have color maps and normal maps, and texture coordinates the same. 2. Model is a head. 3. The right part of head is mirrored by left part in 3ds max. 4. Left part and right part have same texture coordinates, texture is reusable. Results: The tangent and binormal are not smooth, I know is corrected, but how to solve this problem? Is the texture must not be reused? Thank you any suggestions

The left part of head's texture coordinate is same to right part, Because the model is generate by mirror tools in 3dsmax.
And there is a half head only on color map and normal map.

Do you means that : I must draw all head on the texture in photoshop?