Getting "Shader compatibility/fullscreen_tri.frag error: Undefined refraction_enabled" When using zesterer Shaders

[pazrael]

Hello, I have an OpenMW installation based off of the Total Overhaul mod list (Which uses https://modding-openmw.gitlab.io/momw-post-processing-pack/). I have downloaded the .49 version of the zesterer shaders, replacing the shaders directory in the resources folder of the OpenMW 0.49 RC6 directory, but when I start OpenMW, I get the error "Shader compatibility/fullscreen_tri.frag error: Undefined refraction_enabled".

I am trying to use PBR textures for SVNR's Caverns Overhaul (using these - https://www.nexusmods.com/morrowind/mods/52305?tab=description).

If I use the original OpenMW Total Overhaul shaders, it does enable the PBR, but the reflections are "blue" and not normal.

Any ideas or feeback welcome.

Thanks,

Paz

[pazrael]