I have a issue only in radeon cards. I test my shader with other graphical card and works fine.
This issue is tested with last iMac ATI radeon R9 M395 2048 MB.
When I add some values to uv in fragment shader, the border or the triangles are not correct. ( With mipmapping )
Without mipmapping works fine.
I write a simple code. Attach you will find a picture to see the problem.
vec2 resultado0=TexCoord0 + vec2(0.5,0.5);
vec4 tTex =texture2D(tTextura, resultado0);
Thanks in advance