Anisotropy added, clearcoat removed

* Added anisotropy extension.
* Removed clearcoat, because it makes anisotropy more difficult to examine.
* Renamed the folder and files.
* New geometry to avoid errors in tangent space calculation.
* Details added to normal texture for weave curvature and fibre bumpiness.
* Normalized the normal texture as 3d vectors, and the anisotropy texture as 2d vectors.

2.0/CarbonFibre/README.md

@@ -0,0 +1,20 @@
+# Carbon Fibre
+
+## Screenshot
+
+![screenshot](screenshot/screenshot_large.jpg)
+
+Screenshot from the [glTF Sample Viewer](https://github.khronos.org/glTF-Sample-Viewer-Release/) with the Wide Street environment light.
+
+## Description
+
+This model is a sphere using the glTF extension [`KHR_materials_anisotropy`](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_anisotropy) to create a carbon fibre material. 
+
+The normalTexture is a higher resolution than the others to preserve more details in the shapes of individual fibres. The anisotropyTexture could in theory be only 4x4 pixels however that tends to introduce upscale artifacts. 
+
+![textures](screenshot/textures.jpg)
+
+
+## License Information
+
+(C) 2023, Wayfair LLC. CC-BY 4.0 International https://creativecommons.org/licenses/by/4.0/. Model and textures created by Eric Chadwick.

2.0/ClearCoatCarbonFibre/glTF/ClearCoatCarbonFibre.gltf → 2.0/CarbonFibre/glTF/CarbonFibre.gltf

@@ -1,13 +1,9 @@
 {
     "asset": {
         "version": "2.0",
-        "generator": "babylon.js glTF exporter for 3dsmax 2022 v20220210.4",
-        "copyright": "CC0, No Rights Reserved. Model and texture created by Eric Chadwick"
+        "generator": "3ds Max, Max2Babylon, Visual Studio Code, glTF Tools",
+        "copyright": "(C) 2023, Wayfair LLC. CC-BY 4.0 International https://creativecommons.org/licenses/by/4.0/. Model and textures created by Eric Chadwick."
     },
-    "extensionsUsed": [
-        "KHR_texture_transform",
-        "KHR_materials_clearcoat"
-    ],
     "scene": 0,
     "scenes": [
         {
@@ -24,7 +20,7 @@
                 0.5,
                 0.0
             ],
-            "name": "Sphere"
+            "name": "CarbonFibre"
         }
     ],
     "meshes": [
@@ -40,123 +36,140 @@
                     "material": 0
                 }
             ],
-            "name": "Sphere"
+            "name": "CarbonFibre"
         }
     ],
     "accessors": [
         {
             "bufferView": 0,
             "componentType": 5123,
-            "count": 9216,
+            "count": 11904,
             "type": "SCALAR",
             "name": "accessorIndices"
         },
         {
             "bufferView": 1,
             "componentType": 5126,
-            "count": 1728,
+            "count": 2129,
             "max": [
-                0.5000792,
-                0.4901544,
-                0.5000792
+                0.5,
+                0.5,
+                0.5
             ],
             "min": [
-                -0.5000792,
-                -0.490154475,
-                -0.5000792
+                -0.5,
+                -0.5,
+                -0.5
             ],
             "type": "VEC3",
             "name": "accessorPositions"
         },
         {
             "bufferView": 1,
-            "byteOffset": 20736,
+            "byteOffset": 25548,
             "componentType": 5126,
-            "count": 1728,
+            "count": 2129,
             "type": "VEC3",
             "name": "accessorNormals"
         },
         {
             "bufferView": 2,
             "componentType": 5126,
-            "count": 1728,
+            "count": 2129,
             "type": "VEC2",
             "name": "accessorUVs"
         }
     ],
     "bufferViews": [
         {
             "buffer": 0,
-            "byteLength": 18432,
+            "byteLength": 23808,
             "name": "bufferViewScalar",
             "target": 34963
         },
         {
             "buffer": 0,
-            "byteOffset": 18432,
-            "byteLength": 41472,
+            "byteOffset": 23808,
+            "byteLength": 51096,
             "byteStride": 12,
             "name": "bufferViewFloatVec3",
             "target": 34962
         },
         {
             "buffer": 0,
-            "byteOffset": 59904,
-            "byteLength": 13824,
+            "byteOffset": 74904,
+            "byteLength": 17032,
             "byteStride": 8,
             "name": "bufferViewFloatVec2",
             "target": 34962
         }
     ],
     "buffers": [
         {
-            "uri": "ClearCoatCarbonFibre.bin",
-            "byteLength": 73728
+            "uri": "CarbonFibre.bin",
+            "byteLength": 91936
+        }
+    ],
+    "extensionsUsed": [
+        "KHR_materials_anisotropy"
+    ],
+    "images": [
+        {
+            "uri": "CarbonFibre_occlusion.png"
+        },
+        {
+            "uri": "CarbonFibre_normal.png"
+        },
+        {
+            "uri": "CarbonFibre_anisotropy.png"
+        }
+    ],
+    "textures": [
+        {
+            "name": "CarbonFibre_occlusion.png",
+            "sampler": 0,
+            "source": 0
+        },
+        {
+            "name": "CarbonFibre_normal.png",
+            "sampler": 0,
+            "source": 1
+        },
+        {
+            "name": "CarbonFibre_anisotropy.png",
+            "sampler": 0,
+            "source": 2
         }
     ],
     "materials": [
         {
+            "name": "CarbonFibre",
             "pbrMetallicRoughness": {
                 "baseColorFactor": [
-                    0.05,
-                    0.05,
-                    0.05,
-                    1
+                    0.009,
+                    0.009,
+                    0.009,
+                    1.0
                 ],
                 "metallicFactor": 0,
-                "roughnessFactor": 0.6
+                "roughnessFactor": 0.4
             },
             "normalTexture": {
-                "index": 0,
-                "extensions": {
-                    "KHR_texture_transform": {
-                        "scale": [
-                            4,
-                            4
-                        ]
-                    }
-                }
+                "index": 1,
+                "scale": 2
+            },
+            "occlusionTexture": {
+                "index": 0
             },
             "extensions": {
-                "KHR_materials_clearcoat": {
-                    "clearcoatFactor": 0.75,
-                    "clearcoatRoughnessFactor": 0.05
+                "KHR_materials_anisotropy": {
+                    "anisotropyStrength": 0.5,
+                    "anisotropyRotation": 0,
+                    "anisotropyTexture": {
+                        "index": 2
+                    }
                 }
-            },
-            "doubleSided": false,
-            "name": "carbon fibre"
-        }
-    ],
-    "textures": [
-        {
-            "sampler": 0,
-            "source": 0,
-            "name": "ClearCoatCarbonFibre_Normal.png"
-        }
-    ],
-    "images": [
-        {
-            "uri": "ClearCoatCarbonFibre_Normal.png"
+            }
         }
     ],
     "samplers": [