Non-Visual Sensor Material Attributes

Overview

This capability provides requirements for material attributes that enable accurate non-visual sensor simulation (such as radar, lidar, thermal imaging). These attributes define material properties that affect sensor response but are not visible to the human eye.

Note

This capability is only applicable to NVIDIA Omniverse RTX.

Summary

• All geometry prims with computed purpose “render” or “default” must have non-visual material properties assigned through bound materials

• Non-visual material properties must be consistent with visual material properties

• Non-visual material properties cannot be time-varying

Granularity

Non-visual sensor attributes must exist on all visual material prims applied to a 3D asset, including all three predefined metadata properties based on the material substrate (e.g., metal, glass, rubber).

Important

There are a defined number of valid, measured values that can be applied to the base, coating and attributes properties. They can be found in this table.

USDA Sample

Below is an example of how non-visual sensor attributes are authored on a material prim:

def Material "Aluminum" (
    prepend apiSchemas = ["MaterialBindingAPI"]
)
{
    token omni:simready:nonvisual:base = "aluminum"
    token omni:simready:nonvisual:coating = "paint"
    token[] omni:simready:nonvisual:attributes = ["none"]
}

def Mesh "AluminumSurface" (
    apiSchemas = ["MaterialBindingAPI"]
)
{
    rel material:binding:full = </World/Looks/Aluminum>
}

Requirements

Tags	Summary	Compatibility	Validator
🔑	Materials must specify additional “non-visual” material attributes	rtx	latest+
✅	Materials must specify a base material type	rtx	latest+
✅	Materials must specify surface coating	rtx	latest+
✅	Attributes must be on bound materials	rtx
✅	Properties must be consistent with visual materials	rtx
✅	Properties must not be time-varying	rtx	latest+