Either everything's black or everything's green

[asik]

On a clean GOG 2.6.6.0 install, Windows 11:

WeiDU log:

// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~DRUNKSHADERS/DRUNKSHADERS.TP2~ #0 #0 // [Quick menu placeholder]: 0.3.5
~DRUNKSHADERS/DRUNKSHADERS.TP2~ #0 #1000 // Adjustable shaders coded by a drunk tiefling [Main component]: 0.3.5
~DRUNKSHADERS/DRUNKSHADERS.TP2~ #0 #1125 // Scaling filter -> Use Catmull-Rom interpolation in all shaders: 0.3.5
~DRUNKSHADERS/DRUNKSHADERS.TP2~ #0 #1225 // Outline changes via shaders -> Disable sprite outlines in all sprites: 0.3.5
~DRUNKSHADERS/DRUNKSHADERS.TP2~ #0 #9005 // GLSL Optimization -> Process shaders with GLSL Optimizer [WARINIG: manual editing won't be possible after this step]: 0.3.5

The first time, I didn't install "GLSL Optimization -> Process shaders with GLSL Optimizer " and all I would get is a black screen.
Anyone has seen this before?