OGL looks cruddy for some reason

[sasuketo uzuchihamaki]

OpenGL looks kind of worse than software for some reason. Before I wiped my PC, it looked completely fine, but now it it looks kind of crappy and glitchy-looking. Also, sometimes the characters have a weird border line thing around them the same color as the ground, I don't really know how to describe it. Someone please tell me what's wrong :(

 

[a bee]

Your video card driver is forcing texture compression on anything that loads onto the card. Go into your card's control panel and crank the mipmap detail to maximum.

 

[Violo]

The borderline of the background is normal, it happens when you're in a different colourmap, like under the water, so don't worry about that. THose pixels though... What's your resolution for SRB2?