What are some alternatives?
When comparing Quill by Story Studio and Oculus Medium, you can also consider the following products
A-Painter - Paint in VR in your Browser
MasterpieceVR - Powerful VR sculpting & painting tool
Tilt Brush by Google - Paint in spaces around you with Virtual Reality
Kingspray Graffiti - Collaborative graffiti simulator with realistic spray and drip effects.
VR Sketch - A tool for designers to draw inside virtual reality
Kodon - Kodon is the fastest-growing feature-rich VR sculpting and modeling software designed for professionals who want to do their commercial projects easily and quickly.