Admittedly, I have not used Tilt Brush for my Oculus Touch in months. It's not that I don't enjoy Tilt Brush, I really do, and l also feel that this application over so many others is a great way to showcase the immediacy and immersion of creating content in VR. But the lack of layer 'control' is something that I prefer in Quill over Tiltbrush, and I found the export process to be very challenging, both to other 3d applications and to showcase tools like Sketchfab. So I was really pleasantly surprised to fire up my Oculus Touch with a recent set of updates to see that Sketchfab now has implemented export direct from the interface of Tiltbrush! I will need to experiment more with this for sure. More info on this here:
https://sketchfab.com/blogs/community/tilt-brush-adds-direct-sketchfab-export-in-v23-update/