What should I do to have a left box as the same as the right one ?
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Make your texture square. You’re mapping a rectangular texture to a square mesh.
Ok thank you, but I have one more question how can I repeat that texture one a plane I need it almost 100 ?
duplicate the object .
100 times ;p? is there any diferet way ?
looks like your using blender right?
in blender youll have do adjust the UVW mapping to make the texture tile across your plane, i use 3d max so im not sure how to do it in blender but its a pretty standard procedure, so im sure theres plenty of tutorials on youtube or by a simple google search
also for the blurriness select your texture within unity, look at the import options, changed compressed to true color, it should help out
and if your using it for GUI, change it from texture to GUI