For an unknown reason when I open a texture with “image texture” then do a “smart UV project” with it, it’s inverted.
This is blender 2.91
Strangely this is not the case in the anterior version of blender
as showed here
this is blender 2.80 , I also teste on 2.79, this issus only appear in blender 2.91.
I’m using linux UBUNTU and never add any issue.
aside from this all texturing technique seems to work without any trouble.