Minecraft 1.12.2
Forge Ver 14.23.5.2838
Windows 10, GeForce 980m, i7 cpu, 16 gB of ram

Yeah... installed BetterPortals 2.0 to see if the flickering was fixed... Game save loaded, but no world rendering. Aside from Hwyla info box, Minimap, Belt, etc...

Could walk around and everything.

I need more info on which mods you've got installed, one of them is probably conflicting with the way BP 0.2 does its rendering now.

Edit: Maybe #125?

As I was reading your response, I realized that I had KUDA shaders installed... facepalm

Definitely #125.