A tiny mod that updates the Angel's Hydro Plant building sprite to better match the rusted metallic aesthetic of the early game factory.
This mod uses late patching, and is thus fully compatible with any mod that uses the same hydro plant graphics. I personally recommend it for Nullius, since you use many Hydro Plants in the early game and my edits make them blend into the Tier 1 factory more seamlessly.
Full disclosure: I made use of AI image tools to prototype some of the texture, though the final edit work is composited by hand. All credit goes to Angel's excellent original work.