What are some alternatives?
When comparing Quill by Story Studio and A-Painter, you can also consider the following products
Oculus Medium - Sculpt, model and paint in virtual reality on a 3D canvas.
Tilt Brush by Google - Paint in spaces around you with Virtual Reality
MasterpieceVR - Powerful VR sculpting & painting tool
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.