with vivecraft installed, the gui renders with a solid black background

looked through the code and found this which is likely the cause
2cb43be

this seems to clear the alpha channel, which vivecraft uses to render the gui in the world

not sure what exactly it is supposed to fix

using
CreativeCore_FABRIC_v2.11.33_mc1.20.1
EnhancedVisuals_FABRIC_v1.8.1_mc1.20.1
fabric-api-0.92.2+1.20.1
vivecraft-1.20.1-1.1.11-fabric

Problem is that I need this extra layer negate ugly render issues when blur shader is active, which causes a black shade around some of my particles. I could add an option to disable this fix, maybe it does fix the vivecraft compatibility but it will cause the issue to occur again.
Is it possible to switch to 1.21 and see if it works there?

I can check, but I assume it will be the same issue

exact same issue

CreativeCore_FABRIC_v2.12.9_mc1.21
EnhancedVisuals_FABRIC_v1.8.9_mc1.21
fabric-api-0.103.0+1.21.1
vivecraft-1.21-1.1.11-b5-fabric

I could add an option to disable this fix, maybe it does fix the vivecraft compatibility but it will cause the issue to occur again.

and option to disable it should be fine for vivecraft. the gui is there manually rendered, and shouldn't cause the black issues

Added it in this version. You can disable the setting using /cmdclientconfig. Setting is called fixBlurShader. Can you test if it actually helps?
https://www.dropbox.com/scl/fi/acfdtstty8whnhse866h3/EnhancedVisuals_FABRIC_v1.8.11_mc1.21.1.jar?rlkey=wju370x800d1csl4btfl12ibp&st=yaspl1u2&dl=1

yes that works.

Thanks a lot for testing. New version is released which includes this setting.