Versions

Betweenlands version:

TheBetweenlands-3.4.9-universal.jar

Forge version:

forge 1.12.2-14.23.5.2784

Singleplayer or Multiplayer:

Multiplayer

Installed mods:

OptiFine_1.12.2_HD_U_E3.jar

Link to full crash log

Description of the problem

How to reproduce:

1. Optifine shader were set to internal
2. and going in or spawning in the betweenlands

Expected result:

Normal screen size, as usual.
Note: Monitor Resolution is in 3440 x 1440

Actual result:

Screen becomes 1/4 of the original size and it is positioned on the lower left.
But when I go back to the original dimension overworld, screen is normal again.

Pictures:

hi! TheCyberBrick

I want to try to disable betweenlands shader , is this the one?

B:dimension_shader_only=false
or
B:use_shader=false

but actually they are all false by default.

thanks

Hm, ok, that's strange. I don't have that problem with the same OptiFine version. And usually use_shader value is true by default, are you sure they are actually false and you're not looking at an unused copy of the file?

You need to either fully disable OptiFine's shaders (set to OFF), or disable the Betweenlands shaders (in the mod config). Can't have both enabled at the same time. Alternatively you can configure both mods such that there's always only one shader active per dimension.

yes its all false by default.

Hmm I'll need to do some further testing then, because it works fine for me with that OptiFine version on full HD. Need to find a way to run it at higher resolution :P
What's your graphics card?