The Mixer, a machine that would take multiple late-game resources and combine them. The functionality was eventually rolled into the Crusher machine.
Early Mixer exploration
And early design for the Monorail Depot, which acts as a hub for transporting goods via small carts along a spline-based rail system.
A later iteration of the Planter, which more-or-less stayed the same as my earlier design.
Planter exploration. We hadn't yet decided how prominently to feature any hydroponics or terrarium features.
The Windsplitter, a baffle to protect your factory from the dust storms that would cover your machines with harmful sand.
Final concepts for the Wind Turbine before the wind mechanic was scrapped
Wind Turbine detail concepts
Techtonica - Various Machine Concepts
Various concepts for machines, some of which never made it into the game for one reason or another. Along with handling all concept work, I also modeled prototype meshes to test out mechanics, scale, and placement in game. We would use these 3d roughs to finalize designs in context and refine concepts before sending the specs to outsourcing to do the final meshes and texture work.