There is no renderer mixed into anything. I would suggest you look at the actual crates. There is the truck-rendimpl crate and that is not relied on by any othe

There is no renderer mixed into anything. I would suggest you look at the actual crates. There is the truck-rendimpl crate and that is not relied on by any other truck-* crate that does actual B-Rep stuff. I also think you confuse the book/tutorial with the documentation on docs.rs. My impression is that the former is very much a work in progress. I never looked at it until now. The latter (and the examples in the resp. crates) is what you want to check out to see the kernel being used. E.g. https://github.com/ricosjp/truck/blob/master/truck-modeling/examples/bottle.rs https://github.com/ricosjp/truck/blob/master/truck-modeling/... The main README has links to all the documentation of the crates.