This is a recreation of APHD from Portal Stories: Mel for me to study. I also (heavily) referring to Rachel van der Meer's model (https://www.artstation.com/artwork/b5m40k). Rendered in Unreal Engine 5.
Wireframe 1
Wireframe 2
Wireframe 3
Materials breakdowns and UV layout
Some graphics I made for the decals using Inkscape (there might be some errors).