Probably you have Optifine or other program/shaders that cause conflict with thaumcraft warp effect shaders so heres the FIX! Go to %AppData%\Roaming\.mineyourmind\instances\gtnewhorizons\minecraft\config (If you use MyM launcher you can r-click the modpack and select "View folder" just below "Launch") Open Thaumcraft.cfg - notepad will work perfectly Search(ctrl+f in notepad) for "shaders" change to false ... Profit - no more pitch black screen that can hide GUI, menu EVERYTHING!
