Here are the trees I have been working on lately.
I'm considering releasing a pack with the initial TreeIt files, the Blender "intermediate" files and the "final" tree files for Assetto Corsa converted with the CSP internal tool.
I also plan to post a tutorial of sorts, describing the process I use to create and convert the trees from TreeIt.
I can't say when though, as I also want to update existing mods and create new ones, and have limited time to do all this.