I found this shader and added it to my TextureProgress node, unfortunately I don't know much about shaders and don't know how to debug here.
The two issues are that I only want the shader to run on the
under texture, you can see there is some alpha in the middle of the image due to inner-alpha of the
progress texture. I would prefer to fix this in the node/shader instead of just removing the alpha section.
The other issue is parts of the shader are clipped off. I suppose that it is extending outside the bounds of the parent node and thus isn't shown, how can I fix that?