Fix issues with lighting and occlusion

Assets/Models/CGVR Lab/MaterialSample.gltf

@@ -0,0 +1,141 @@
+{
+	"asset":{
+		"version":"2.0",
+		"generator":"Houdini GLTF 2.0 Exporter"
+	},
+	"accessors":[
+		{
+			"bufferView":0,
+			"componentType":5123,
+			"count":3162,
+			"type":"SCALAR",
+			"min":[0
+			],
+			"max":[3161
+			]
+		},
+		{
+			"bufferView":1,
+			"componentType":5126,
+			"count":3162,
+			"type":"VEC3",
+			"min":[-1.70177305,0,-1.70177305
+			],
+			"max":[1.70177305,1.09360051,1.70177305
+			]
+		},
+		{
+			"bufferView":2,
+			"componentType":5126,
+			"count":3162,
+			"type":"VEC2",
+			"min":[0,2.50339508e-05
+			],
+			"max":[0.999976933,1
+			]
+		},
+		{
+			"bufferView":3,
+			"componentType":5126,
+			"count":3162,
+			"type":"VEC3",
+			"min":[-0.965720117,-1,-0.965512037
+			],
+			"max":[0.965720057,1,0.965511978
+			]
+		},
+		{
+			"bufferView":4,
+			"componentType":5125,
+			"count":3162,
+			"type":"SCALAR",
+			"min":[0
+			],
+			"max":[0
+			]
+		},
+		{
+			"bufferView":5,
+			"componentType":5126,
+			"count":3162,
+			"type":"SCALAR",
+			"min":[0.788376808
+			],
+			"max":[0.788376808
+			]
+		}
+	],
+	"buffers":[
+		{
+			"uri":"MaterialSample_data.bin",
+			"byteLength":132804,
+			"name":"main_buffer"
+		}
+	],
+	"bufferViews":[
+		{
+			"buffer":0,
+			"byteLength":6324,
+			"target":34963
+		},
+		{
+			"buffer":0,
+			"byteOffset":6324,
+			"byteLength":37944,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteOffset":44268,
+			"byteLength":25296,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteOffset":69564,
+			"byteLength":37944,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteOffset":107508,
+			"byteLength":12648,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteOffset":120156,
+			"byteLength":12648,
+			"target":34962
+		}
+	],
+	"nodes":[
+		{
+			"name":"grid1",
+			"mesh":0
+		}
+	],
+	"meshes":[
+		{
+			"primitives":[
+				{
+					"attributes":{
+						"_coverage":5,
+						"_numnonpacked":4,
+						"NORMAL":3,
+						"TEXCOORD_0":2,
+						"POSITION":1
+					},
+					"indices":0
+				}
+			]
+		}
+	],
+	"scenes":[
+		{
+			"nodes":[0
+			]
+		}
+	],
+	"scene":0
+}