Advanced replacement shaders

Hello -

I have some shader code that I am able to use in Shader Replacements. It seems to run without any errors, but it doesn’t do anything either. It contains a bunch of uniform variables and I can not figure how to set or change them. I think something else is preventing the shader from affecting the render, but changing the uniforms will be needed regardless.

So how do I make runtime changes to values of uniforms in GLSL replacement shaders in Paraview?

Thanks you.