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567ee25f1d
Created comprehensive test suite for OpenPBR materials demonstrating various material properties and texture mapping workflows. All scenes use proper USD shader node IDs (OpenPBRSurface, UsdUVTexture, UsdPrimvarReader_float2) rather than MaterialX node definition IDs. New test files: - openpbr-brick-sphere.usda: Diffuse material with brick texture - openpbr-metallic-cube.usda: Metallic material with checkerboard - openpbr-emissive-plane.usda: Emissive with cat texture (Mesh - MaterialX exportable) - openpbr-glass-sphere.usda: Glass/transmission material - openpbr-subsurface-sphere.usda: Subsurface scattering with texture - openpbr-coated-cube.usda: Clear coat over brick texture - openpbr-multi-object.usda: Multi-material scene (4 objects, 4 materials) Texture asset: - textures/brick.bmp: 64x64 red brick pattern with gray mortar - create_brick_texture.py: Python script to generate brick texture Documentation: - OPENPBR_TESTS_README.md: Comprehensive guide covering material structure, shader node IDs, Tydra conversion limitations, and testing procedures Material features demonstrated: - Base layer (color, metalness, roughness) - Specular (weight, roughness, IOR) - Transmission (weight, color, thin_walled) - Emission (color, luminance) - Subsurface scattering (color, weight, radius, radius_scale) - Coat (weight, roughness, IOR, color) - Texture mapping with UV coordinates - Multiple texture formats (BMP, PNG, JPG) Note: Materials bound to parametric primitives (Sphere, Cube) are not currently converted by Tydra RenderScene. Use explicit Mesh primitives for MaterialX export compatibility. Tested: All files parse correctly, emissive-plane exports to MaterialX XML/JSON 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
56 lines
1.6 KiB
Plaintext
56 lines
1.6 KiB
Plaintext
#usda 1.0
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(
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doc = "Simple OpenPBR material with brick texture"
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metersPerUnit = 1
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upAxis = "Y"
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defaultPrim = "World"
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)
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def Xform "World"
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{
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def Sphere "BrickSphere"
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{
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double radius = 1.0
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rel material:binding = </World/_materials/BrickMaterial>
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texCoord2f[] primvars:st = [(0, 0), (1, 0), (1, 1), (0, 1)] (
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interpolation = "vertex"
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)
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}
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def Scope "_materials"
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{
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def Material "BrickMaterial"
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{
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token outputs:surface.connect = </World/_materials/BrickMaterial/OpenPBRSurface.outputs:surface>
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def Shader "OpenPBRSurface"
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{
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uniform token info:id = "OpenPBRSurface"
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color3f inputs:base_color.connect = </World/_materials/BrickMaterial/BrickTexture.outputs:rgb>
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float inputs:base_metalness = 0.0
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float inputs:base_weight = 1.0
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float inputs:specular_roughness = 0.7
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float inputs:specular_weight = 0.5
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token outputs:surface
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}
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def Shader "BrickTexture"
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{
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uniform token info:id = "UsdUVTexture"
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asset inputs:file = @./textures/brick.bmp@
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string inputs:filtertype = "linear"
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float2 inputs:texcoord.connect = </World/_materials/BrickMaterial/Primvar.outputs:result>
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color3f outputs:rgb
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}
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def Shader "Primvar"
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{
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uniform token info:id = "UsdPrimvarReader_float2"
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int inputs:index = 0
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float2 outputs:result
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}
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}
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}
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}
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