Got carried away with automating a sprite rendering pipeline, and suddenly this mod happened!

The models are defined programmatically with constructive solid geometry via signed distance fields, rendered with a home-grown path tracer.

The vaguely metallic-powder-coated finish is not a deliberate texture, but an artifact of halting the path tracer before it could remove all the sampling noise. Looks a bit pretty with Factorio's cloud patterns drifting overhead :)