À noter que l'article date de 2012.
voir aussi : http://forum.unity3d.com/threads/pot-and-npot-textures-problem.18607/
(2009) et Aras (de Unity) qui répond :
"You should just use NPOT textures.
If they come out blurry, then there's something wrong somewhere (and it would be good to know what you're doing that makes them blurry).
And do not worry about hardware support; we do store textures at NPOT size (to save space), but at load time we create a texture that is next power of two, and pad that texture with dummy pixels (and if original NPOT texture is DXT compressed, we blit the DXT compressed blocks and fill the rest with dummy DXT blocks - so the resulting texture is still DXT compressed). And then we do some magic so that GUI that uses that texture is still always referencing the correct portion of that "padded up" texture.
In other words, don't worry"