Charging unit
Final render
Solid view
Charging unit (animation)
Charging Unit Marmoset Preview
Charging Unit Sketchfab Preview
Some hard-surface practice. I just winged it with no reference or clear idea in mind.
Modelled in Blender 2.83, Textured with Grungit ( https://blendermarket.com/products/grungit/ ) and rendered in with Cycles.