Hi my textures are usually getting this same problem. It is the this are just skews the UV test grid. Everything else is fine I just don’t know why this is like this. Can you help or give a hint of doing it better?
BlendFace
Well, UV-mapping can be quite tricky (seams and pinning and such).
Could you show us the UV-layout?
The skewing is usually called stretching. You can generally alleviate this by making more
seams, preferably at sharp angles.
You can also see major problem areas by going into the UV editor, and select View >>
View Properties >>> Click ‘UV Stretch’ to display problems in blue.