Or you could put it this way, make a thread add the shader images but you
must have normal pictures? I mean see it this way there are people who use shaders on MCSG have two sort of images wouldn't be a problem would it? So the people who actually use the mod would know how it would look like for them (depending on what shaders pack they use) and then the people that don't use the mod would see how it would look like for them (depending on what resource pack they're using). Other than that it shouldn't be a problem, should it?