Increased texture resolutions

* Texture resolutions increased, using 8k source files from Polyhaven.com.
* Re-packed the textures into new optimized UVs.
* Re-generated new occlusion and diffuseTransmission textures.
* Increased curvature resolution of original models via subdivision.
* Optimized texture resolutions and formats for efficient file size while retaining details.

Models/DiffuseTransmissionTeacup/README.body.md

@@ -1,7 +1,7 @@
 ## Screenshot
 
 ![Screenshot from glTF Sample Viewer](screenshot/screenshot_Large.jpg)
-<br/>_Screenshot from [UX3D glTF Sample Viewer](https://gltf.ux3d.io/) with the environment Wide Street, environment rotation set to -Z, and the ACES (Hill) tonemapper._
+<br/>_Screenshot from [UX3D glTF Sample Viewer](http://gltf.ux3d.io/) with the environment Wide Street, environment rotation set to -Z, and the ACES (Hill) tonemapper._
 
 ## Description
 
@@ -11,4 +11,4 @@ This asset demonstrates the use of KHR_materials_diffuse_transmission to represe
 <br/>_With the extension, versus without it._
 
 ![The ingredients used for Diffuse Transmission](screenshot/diffuse-transmission-features.jpg)
-<br/>_The ingredients used for Diffuse Transmission._
+<br/>_The ingredients used for Diffuse Transmission: diffuseTransmissionColorFactor, and diffuseTransmissionFactor._

Models/DiffuseTransmissionTeacup/README.md

@@ -0,0 +1,37 @@
+# DiffuseTransmissionTeacup
+
+## Tags
+
+[showcase](../../Models-showcase.md), [extension](../../Models-extension.md)
+
+## Summary
+
+DiffuseTransmissionTeacup model using Diffuse Transmission extension.
+
+## Operations
+
+* [Display](https://github.khronos.org/glTF-Sample-Viewer-Release/?model=https://raw.githubusercontent.com/KhronosGroup/glTF-Sample-Assets/main/./Models/DiffuseTransmissionTeacup/glTF/DiffuseTransmissionTeacup.gltf) in SampleViewer
+* [Model Directory](./)
+
+## Screenshot
+
+![Screenshot from glTF Sample Viewer](screenshot/screenshot_Large.jpg)
+<br/>_Screenshot from [UX3D glTF Sample Viewer](http://gltf.ux3d.io/) with the environment Wide Street, environment rotation set to -Z, and the ACES (Hill) tonemapper._
+
+## Description
+
+This asset demonstrates the use of KHR_materials_diffuse_transmission to represent thin-surface transmission of light through a thin ceramic teacup and saucer. 
+
+![With the extension, versus without it.](screenshot/with-vs-without.jpg)
+<br/>_With the extension, versus without it._
+
+![The ingredients used for Diffuse Transmission](screenshot/diffuse-transmission-features.jpg)
+<br/>_The ingredients used for Diffuse Transmission: diffuseTransmissionColorFactor, and diffuseTransmissionFactor._
+
+## Legal
+
+&copy; 2023, Public domain. [CC0 No Rights Reserved](https://creativecommons.org/share-your-work/public-domain/cc0)
+
+ - Polyhaven.com, and Eric Chadwick for Everything
+
+#### Assembled by modelmetadata