Texture showing errors (edges of texture)? Here I have a simple white-to-transparent image in the UV editor.



I've selected a plane thats in correct proportion in size to the image, and I've unwrapped it.





At first, it looks just fine.



When you zoom in or focus at the very edge of the plane, you can see a little error: the texture and unwrap goes from white to transparent, but the object is showing a little white part at the edge of the object. It is small, but it is very noticeable in play-mode.

How can I fix this? How can I have the texture not show these errors?
Cause

I think the texture gets blurred either because it is scaled out or scaled in via automatic mipmapping texture.



Blur means the adjacent texels are considered when calculating the color.

It will include any texel outside the UV area. It even wraps around the around the texture's border (which is the cause of the effect you discover).



Solution

In both cases I suggest you shrink the UV-face that you get some border around the face (in UV-Editor).



Reference

See Avoid Seams in Textured Objects