Versions

Betweenlands version:

3.3.3

Forge version:

14.23.2629

Installed mods:

OptiFine C9

Description of the problem

I get green screen from the color of Betweenlands sky when OptiFine, even when no shaders are present, and Betweenlands shaders are turned off.

I've tested it with Optifine HD_U_C9 and I don't have any issues.
Does this only happen when you have Optifine installed?

A picture or even better a video would be helpful

Ah ok figured it out. Optfine has an "internal" shader. If you go to the shaders menu you need to select "OFF" and then it should work.
I think I can fix this in the mod, but for now just set it to OFF.

Yeah it's what I just said, even with internal shader, or the simplest shader, it doesn't work.

You said

even when no shaders are present

The "internal" shader is a shader

Shaders generally don't work well in other dimensions (e.g. Twilight Forest too), some work and some don't. We don't plan on supporting all shaders, but I'll see what I can do

593dc5f

Compatibility should be a bit better now, and it seems to work with the interal shaders too.
So until the new update you can set shaders to OFF as a workaround.