These are from a PyRevit Extension I'm building called Blendit - making it easy for users to get consistent and quality renders from revit for free - open source.
https://github.com/lewismconte/blendit
Link above if you want to try.
I got tired of the setup and the subscriptions around getting a decent render out of a Revit model, so I built BlendIt — a free, open-source pyRevit extension that sends your active 3D view straight into Blender and renders it, all from the ribbon. No Blender setup, no material wrangling.
In the comments is Autodesk's Snowdon Towers sample run through a few of the modes: clay, pen-and-ink, sepia sketch, a flat colour pass, blueprint, and clean linework. The line modes are the part I'm most into — the linework comes out as vectors, so you can open it in Illustrator and keep editing (line weights, labels, the lot).
It's MIT licensed, runs on Blender, and works offline. Windows only for now, and it's genuinely v1, so I'd really value feedback, bug reports, or feature ideas from people in Revit day to day.
Repo: https://github.com/lewismconte/blendit
Happy to answer anything about how it works.