Hiya!! For some reason these shaders work perfectly on Optifine but not on Iris.

I am using version 1.21.1
iris 1.7.3
sodium 0.5.11
beyond vanilla 2.9

deferred1.fsh: deferred1.fsh: 0(398) : error C7537: OpenGL does not allow 'sample' after a type specifier
0(398) : error C0000: syntax error, unexpected '=', expecting ';' or '(' at token "="
0(400) : error C0000: syntax error, unexpected ';', expecting "::" at token ";"

This is the error.

Thank you!! These are amazing shaders

Hey there I haven't made the shaders compatible. I also haven't worked on this in a while but thanks for showing interest!