Quote from JonnyBrando
Hmm what video card and driver are you running right now? I can't recall if we've gone over this part before?
Also, what shaderpack are you using?
You might post the logs (%appdata%\.minecraft\logs) of when it was working, and when it wasn't... It could be a shaderpack error..
i am using it with ftb horizons and monster (if it wont work with the one i try with the other)
I am running it on an AMD Radeon HD 8600M Series
driver version is 13.251 (latest from the notebook manufacturer)
laptop is hp pavillion 15-e055sx
also i am using seus and sildurs shaderpack