I'm making something like "Low poly" style game. For that, I'm using multiple materials for each mesh without uv mapping and texturing.
Luckily, only weapon does this, others not. Also it's first person shooter so most of time, it just 7~8 materials requires for rendering.
However, I heard that lots of materials causes more rendering for GPU and it cause performance issue. My target platform is Android, and that could be a big problem.
Should I change all my weapons to have single material each?
This is the screenshot of my game. As you can see, single weapon uses 6 materials.