material-binding#

Code

NVM.004

Validator

Compatibility

rtx

Tags

✅

Summary#

Attributes must be on bound materials

Description#

Non-visual material attributes must be authored on materials that are bound to geometry with material purpose “full”. Attributes cannot be authored directly on geometry prims.

Why is it required?#

  • Ensures consistent material property inheritance

  • Maintains relationship between visual and non-visual attributes

  • Enables material reuse across multiple geometries

Examples#

# Invalid: Attributes on geometry
def Mesh "BadGeometry" (
)
{
    token omni:simready:nonvisual:base = "aluminum"
    token omni:simready:nonvisual:coating = "clearcoat"
}

# Valid: Attributes on bound material
def Material "AluminumMaterial" (
    prepend apiSchemas = ["MaterialBindingAPI"]
)
{
    token omni:simready:nonvisual:base = "aluminum"
    token omni:simready:nonvisual:coating = "clearcoat"
}

def Mesh "GoodGeometry" (
    prepend apiSchemas = ["MaterialBindingAPI"]
)
{
    rel material:binding:full = </Materials/AluminumMaterial>
}

How to comply#

  • Author non-visual material attributes on material prims, not on geometry