Here's a vibrant sci-fi matching pair of skins I made for the Revolver and Crossbow in Diabotical Rogue. These are among some of the most technical skins I've worked on. I authored heightmap stencils to speed up hand-painting consistent shape designs, and all of the different material layers in Substance are leveraging the painted heightmap data in their color roughness and metalness channels.
The Energy Crossbow model was made by me: https://www.artstation.com/artwork/blGLRa
The Revolver model is by: https://www.artstation.com/omar_chaouch