instanceAttributes property
The per-instance attributes this material declares, or null when it
declares none. A .fmat instance_attributes block declares them, as
does a raw ShaderMaterial constructed with instanceAttributes.
The schema widens the instance-rate vertex buffer, so it is part of the pipeline's vertex layout as well as of what an instanced mesh accepts.
Implementation
@override
InstanceAttributeSchema? get instanceAttributes => _instanceAttributes;