Some issie with luquids. To reproduce: set up GT5 distilation tower + with oil in it to produce.
Then use LP Fluid Extractor + LP Fluid Basic Pipes to allow fluid flow.

We've been expieriencing Render Issues with GregTech Fluids a long time now. And its mostly because GT fluids are rendering wierd. Not much we can do ATM

This solves the problem. Can you use such code for GT Fluids?

hmm well i get the open gl error aswell and i dont have gregtech installed

~edit but i do have reika's mods installed e.g rotary- reactor and electricraft

If this was on our side, it would happen with every fluid.