What are some alternatives?
When comparing Kingspray Graffiti and Tilt Brush by Google, you can also consider the following products
Quill by Story Studio - Paint in virtual reality on an infinitely scalable canvas
SprayPrinter - Convert digital designs into wall art from your smartphone
A-Painter - Paint in VR in your Browser
Snap Art - Snap's augmented reality platform
MasterpieceVR - Powerful VR sculpting & painting tool
Blocks by Google - Easily create 3D objects in VR