Transmission tinting asset

Models/TransmissionTinting/LICENSE.md

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+# LICENSE file for the model: TransmissionThinwallTestGrid
+
+All files in this directory tree are licensed as indicated below.
+
+* All files directly associated with the model including all text, image and binary files:
+
+  * [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/legalcode) [SPDX license identifier: "CC0-1.0"]
+
+* This file and all other metadocumentation files including "metadata.json":
+
+  * [Creative Commons Attribution 4.0 International]("https://creativecommons.org/licenses/by/4.0/legalcode") [SPDX license identifier: "CC-BY-4.0"]
+
+Full license text of these licenses are available at the links above.
+
+<!-- This file is auto-generated by modelmetadata. Do not edit by hand. -->

Models/TransmissionTinting/README.body.md

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+## Screenshot
+
+![Screenshot from Adobe Substance 3D Stager](screenshot/raytraced.png)
+<br/>_Screenshot from [Adobe Substance 3D Stager](https://www.adobe.com/products/substance3d/apps/stager.html)._
+
+Rasterizer that only supports a single-layer of transparency. Notice that the volumetric materials include the double-tinting for both sides of the volume as an approximation while the thin-walled materials do not.
+![Screenshot from Babylon.js](screenshot/single_layered_rasterizer.png)
+<br/>_Screenshot from [Babylon.js](https://www.babylonjs.com/)._
+
+Rasterizer that supports multiple layers of transparency.
+![Screenshot from Adobe Substance 3D Stager](screenshot/multiple_layered_rasterizer.png)
+<br/>_Screenshot from [Adobe Substance 3D Stager](https://www.adobe.com/products/substance3d/apps/stager.html)._
+
+## Description
+
+This asset tests the surface-tinting functionality of the [KHR_materials_transmission](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_transmission) and [KHR_materials_diffuse_transmission](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_diffuse_transmission) extensions used in conjunction with thin-walled meshes as well as volumetric (with the [KHR_materials_volume](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_volume) extension). While the cubes are tinted on both sides, the plane represents a single layer of geometry and so should appear lighter than the cubes.

Models/TransmissionTinting/README.md

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+# TransmissionThinwallTestGrid
+
+<!-- This file is auto-generated by modelmetadata. Do not edit by hand. -->
+
+## Tags
+
+[extension](../Models-extension.md)
+
+## Extensions Used
+
+* KHR_materials_transmission
+* KHR_materials_volume
+* KHR_materials_ior
+
+## Summary
+
+Grid of spheres over a checkered backdrop to test Thinfilm and IOR rendering.
+
+## Operations
+
+* [Display](https://github.khronos.org/glTF-Sample-Viewer-Release/?model=https://raw.GithubUserContent.com/KhronosGroup/glTF-Sample-Assets/main/./Models/TransmissionThinwallTestGrid/glTF-Binary/TransmissionThinwallTestGrid.glb) in SampleViewer
+* [Download GLB](https://raw.GithubUserContent.com/KhronosGroup/glTF-Sample-Assets/main/./Models/TransmissionThinwallTestGrid/glTF-Binary/TransmissionThinwallTestGrid.glb)
+* [Model Directory](./)
+
+## Screenshot
+
+![Screenshot from glTF Sample Viewer](screenshot/screenshot_Large.jpg)
+<br/>_Screenshot from [glTF Sample Viewer](https://github.khronos.org/glTF-Sample-Viewer-Release/)._
+
+## Description
+
+This asset tests the differences in index of refraction between thin-wall and volumetric transmission, using extensions [KHR_materials_ior](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_ior), [KHR_materials_transmission](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_transmission), and [KHR_materials_volume](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_volume). The top row of spheres omits the volume extension to cause thin-wall behavior.
+
+The spheres in the bottom row are 2m in diameter with a volume `thicknessFactor` of 1m, to approximate an average thickness through each volume.
+
+## Legal
+
+&copy; 2023, Public. [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/legalcode)
+
+ - Eric Chadwick for Everything
+
+<!-- This file is auto-generated by modelmetadata. Do not edit by hand. -->