The meaning of the material property’s value is not one of the standard semantic uses recognized by Model I/O.
- iOS 9.0+
- macOS 10.11+
- tvOS 9.0+
- Model I/O
A renderer (or other software component processing the material) may use this material property to produce custom effects. If an asset contains more than one user-defined material property, Model I/O gives each a unique integer value, starting with this constant’s value (