@schwa the answer is “no”
you’ll have to go to blighty for that

@maxxfrazer hi Max, thanks for creating RealityGeometries. I’m creating a visionOS app and porting all my SceneKit code to RealityKit. Imagine my surprise to discover that RealityKit doesn’t include a cylinder primitive. Here’s a teaser video of the app: https://www.lunarskydiving.com/relativity/
I’ll include you in the app’s credits. Thanks again.

this app looks awesome!! thanks so much for sharing, and i’m glad my package came in useful for you