Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the steampunk_machine_generator zip.

Usage

1. Open the Steampunk tab in the 3D viewport sidebar (N). With nothing selected, click the picture to choose one of the 51 designs, or browse the seven families, and add it at the 3D cursor. You can also use Shift+A, Mesh, Steampunk Machine.
2. Select any part of a machine to edit it. Surprise makes a new random machine, Variation changes the current one a little, Random Finish picks a palette and wear, and Reset returns to the design.
3. The tabs hold every setting: Machine (kind and its shape), Fittings (chimney, gauges, valves, base), Finish (palette, condition, tarnish, patina, soot, rust), Motion (speed, steam) and Parts (seed, rebuild, delete).
4. Press Play in the Motion tab or play the timeline: flywheels, pistons, gears, needles and steam run on drivers, so render any frame range.