I have what seems like a simple example here. I wanted to practice texture and lighting by making some simple M&M renders. I used a NOISE texture for the surface to give it some "eggshell" quality in the render, I am progressing nicely. Now I'm stuck...
I created the "M" logo as a PNG with alpha channel. I applied it in the material using the image texture with mapping node and texture coordinates. All basic stuff so far.
I can't for the life of me figure out how to use procedural nodes like Voronoi or Noise to make the stark white of the M Logo look "worn" so some of the color of the M&M show through, like it's scuffed. Now the render isn't convincing because every M is too perfect. I know I could use my image editing software to make some alpha transparencies in the PNG decal, but then they would be the same across all meshes, and I was hoping to use a NOISE node to randomize it a bit.
Can't I use a NOISE tesxture to a COLOR RAMP then make one of the colors ALPHA transparent thus having the M logo "Fade" and let the color show through? I think I've tried 100 different things and I am not getting it. (I am not a Blender expert but have an intermediate understanding of texture node setups...)
Here's a link to my .blend file in my dropbox, without ANY treatment on the M logo. You can see they are too stark white and perfect. I want to scuff just the logo up. Any ideas? Thanks in advance! (Render is formatted for dual monitors so please ignore the odd render dimensions!)