Hi there,
Im trying to put some 2d planes with .png images with alpha on my scene to act as a background but some unwanted lines appear around the plane, where the texture is 100% transparent (image below).
Ive tryed a lot of shaders (built-in and wiki) and the lines keep appearing on my screen.
anyone knows a way to solve this issue?
thanks in advance.

Could be the mipmaps doing that, try turning on borders for the mipmaps, see if that helps? Or turning them off entirely (but don’t make a habit of that).
thanks oblivionfeet,
turning off the mipmaps reduced 85% of the problem.
but some smaller lines still apearing at some frames…
I’m using Transparent/Diffuse shader.
In that case you should be able to fix it completely by making the graphic a bit smaller, so there’s a larger transparent border around the edges of it… I think… 
in the texture settings set from repeat to clamp this is it 
DrFromTheLab, that is it.
thanks a lot. 
Gah! I always forget clamp! My bad! 
Is there any other way except doing clamp from repeat as i want to change offset of material via scripting on runtime to create parallaxing in my 2d endless running game