This includes materials using MDLs that are compatible with NVIDIA Omniverse.
Pixar has defined a file format called "Universal Scene Description (USD)".
https://graphics.pixar.com/usd/release/index.html
USD is more than a file format; it also acts as a framework for defining 3D scenes.
I have decided to create a sample of USD files by function.
| File | Material Type | Description |
|---|---|---|
| not_used_defaultPrim.usda | OmniPBR | Do not use defaultPrim |
| use_defaultPrim.usda | OmniPBR | Use of defaultPrim |
| File | Material Type | Description |
|---|---|---|
| MultipleRoots.usda | OmniPBR | Scene with more than one root. Also, defaultPrim is not specified.  |
| File | Material Type | Description |
|---|---|---|
| unit_test_cm.usda | OmniPBR | Placement of 1 meter plane. Stage unit is cm (default.metersPerUnit=0.01).  |
| unit_test_m.usda | OmniPBR | Placement of 1 meter plane. Stage unit is m (metersPerUnit=1.0).  |
| unit_test_mm.usda | OmniPBR | Placement of 1 meter plane. Stage unit is mm (metersPerUnit=0.001).  |
| File | Material Type | Description |
|---|---|---|
| UpAxis_Y.usda | OmniPBR | Up axis Y. |
| UpAxis_Z.usda | OmniPBR | Up axis Z. |
| File | Material Type | Description |
|---|---|---|
| simple_primitives.usda | - | Placement of Cube,Sphere,Cylinder,Capsule,Cone |
| File | Material Type | Description |
|---|---|---|
| basisCurves.usda | - | BasisCurves |
| File | Material Type | Description |
|---|---|---|
| point_light.usda | - | Point Light with Sphere Light. Use the ratio of radius to surface area to achieve the same light intensity  |
| spot_light.usda | - | Spot Light with Sphere Light. Change in Cone Angle and Cone Softness.  |
| rect_light.usda | - | Rect Light. Adjusts the ratio of RectLight area to intensity so that the same amount of light is produced for different sizes.  |
| dome_light.usda | OmniPBR | DomeLight. |
| File | Material Type | Description |
|---|---|---|
| doubleSided.usda | UsdPreviewSurface | DoubleSided. |
| File | Material Type | Description |
|---|---|---|
| VariantTest.usda | OmniPBR | Use Variant. Switch chairs.  Shapes and textures are called from external sources. |
| File | Material Type | Description |
|---|---|---|
| point_instancer_01.usda | UsdPreviewSurface | PointInstancer. |
| File | Material Type | Description |
|---|---|---|
| jointTest.usda | OmniPBR | Skin + Joint. |
| File | Material Type | Description |
|---|---|---|
| simple_mesh_sphere_reference.usda | OmniPBR | Refer to simple_mesh_sphere_reference.usda to simple_mesh_sphere.usda |
| simple_mesh_sphere_payload_nest.usda | OmniPBR | Refer with Payload to two levels. simple_mesh_sphere_payload_nest.usda simple_mesh_sphere_payload.usda simple_mesh_sphere.usda  |
| payload_use_primPath.usda | OmniPBR | Specify PrimPath when doing Payload. Refer to payload_use_primPath.usda to refObjects.usda  |
| File | Material Type | Description |
|---|---|---|
| instance_test.usda | - | Use Instance. |
| File | Material Type | Description |
|---|---|---|
| simpleCube.usda | - | Mesh Cube. normal and UV with interpolation=faceVarying.  |
| simpleCubeVertex.usda | - | Mesh Cube. normal and UV with interpolation=vertex.  |
| concave_polygons.usda | UsdPreviewSurface | Triangulation of polygons. Below is the display in Unity.  This sample is not correctly triangulated even with Omniverse Create 2022.3. |
| easyChair_01.usdc | UsdPreviewSurface | Triangulation of polygons. Below is the display in Unity.  This sample is not correctly triangulated even with Omniverse Create 2022.3. |
| simpleCubeSubdivision.usda | - | Mesh Cube with Subdivision. Use faceVarying with normal and UV.  |
| primvars_normals.usda | OmniPBR | Normals are specified with "primvars:normals". |
UsdPreviewSurface.
| File | Material Type | Description |
|---|---|---|
| UsdPreviewSurface.usda | UsdPreviewSurface | DiffuseColor only. |
| UsdPreviewSurface_texture.usda | UsdPreviewSurface | DiffuseColor Texture. |
| UsdPreviewSurface_multiply_texture.usda | UsdPreviewSurface | DiffuseColor multiply texture. Use inputs:scale.  |
| UsdPreviewSurface_transform.usda | UsdPreviewSurface | DiffuseColor texture with UsdTransform2d. Use inputs:translation, inputs:scale.  |
| UsdPreviewSurface_transform_rotate.usda | UsdPreviewSurface | DiffuseColor texture with UsdTransform2d. Use inputs:translation, inputs:scale, inputs:rotation.  |
| UsdPreviewSurface_opacity.usda | UsdPreviewSurface | Use inputs:opacity. Rendered in RTX-Real-Time. Render Settings-Real Time-Ray Tracing-Translucency-Enable Fractional Cutout Opacity : On |
| UsdPreviewSurface_opacityThreshold.usda | UsdPreviewSurface | Opacity Map, Normal Map. Use inputs:opacityThreshold.  |
| UsdPreviewSurface_cyawan.usda | UsdPreviewSurface | PBR Material. Use diffuseColor Map, Normal Map, Roughness Map, Occlusion Map.  In NormnalMap, bias=(-1, -1, -1, 0), scale=(2, 2, 2, 1). |
| UsdPreviewSurface_vertexColor.usda | UsdPreviewSurface | Vertex Color Supported by USDView, Omniverse RTX (USD Composer 2023.1.1 Beta).  |
| UsdPreviewSurface_vertexColorFaces.usda | UsdPreviewSurface | Vertex Color Supported by USDView, Omniverse RTX (USD Composer 2023.1.1 Beta).  |
| UsdPreviewSurface_emissive_texture.usda | UsdPreviewSurface | Use emissiveColor Texture. |
| UsdPreviewSurface_clearcoat.usda | UsdPreviewSurface | Use clearcoat, clearcoatRoughness. |
| UsdPreviewSurface_clearcoat_with_texture.usda | UsdPreviewSurface | Use clearcoat(with texture), clearcoatRoughness. |
| UsdPreviewSurface_clearcoat_with_texture2.usda | UsdPreviewSurface | Use clearcoat(with texture), clearcoatRoughness(with texture). |
OmniPBR.
| File | Material Type | Description |
|---|---|---|
| UsdPreviewSurfaceAndOmniPBR.usda | OmniPBR | DiffuseColor only. Comparison of UsdPreviewSurace and OmniPBR, where DIffuseColor is stored as "Linear".  |
| OmniPBR_cyawan.usda | OmniPBR | AlbedoMap, RoughnessMap, NormalMap, and OcclusionMap in OmniPBR. |
| OmniPBR_opacity.usda | OmniPBR | Use Opacity. Rendered in RTX-Real-Time. Render Settings-Real Time-Ray Tracing-Translucency-Enable Fractional Cutout Opacity : On |
| OmniPBR_opacityThreshold.usda | OmniPBR | Use OpacityMap. Specify "mono_alpha" in Opacity Mono Source.  |
| OmniPBR_multiply_texture.usda | OmniPBR | DiffuseColor multiply texture. |
| OmniPBR_emissive_intensity.usda | OmniPBR | Use Emissive. Comparison of emissive_intensity. |
| OmniPBR_emissive_texture.usda | OmniPBR | Use emissiveColor Texture. |
| File | Material Type | Description |
|---|---|---|
| displayColor.usda | --- | Set DisplayColor of single color. |
| displayColor_VertexColor.usda | --- | Set the vertex color with DisplayColor. Works with Omniverse RTX, USDView. |
| displayColor_VertexColorFaces.usda | --- | Set the vertex color with DisplayColor. For each face. Works with Omniverse RTX, USDView. |
| File | Material Type | Description |
|---|---|---|
| PointClouds.usda | --- | Point Clouds. Supported by USDView. Omniverse RTX does not reflect DisplayColor to the point. |
The specified DisplayName is used as the Prim name in the UI display.
DisplayName is not bound by any single-byte alphanumeric character or name prefix constraints.
| File | Material Type | Description |
|---|---|---|
| DisplayName.usda | --- | When UTF-8 Japanese is specified as DisplayName. Supported by USDView. DisplayName in Japanese (UTF-8) in Omniverse can be optionally displayed, but the font must be specified. This will be kept private. |
| DisplayName_english.usda | --- | When English is specified as DisplayName. In the Stage window, select "Show Display Names" from the Options menu and set it to On. |
| File | Material Type | Description |
|---|---|---|
| layer1.usda | UsdPreviewSurface | sublayer_sphere.usda of the sublayer from layer1.usda. |
| layer1_override.usda | UsdPreviewSurface | sublayer_sphere.usda of the sublayer from layer1_override.usda. Also, an override was performed in layer1_override.usda.  |
| File | Material Type | Description |
|---|---|---|
| kind.usda | --- | Use kind. |