make dress underside black

assets/models/ar_dress.gltf

@@ -1,6 +1,6 @@
 {
 	"asset":{
-		"generator":"Khronos glTF Blender I/O v4.2.60",
+		"generator":"Khronos glTF Blender I/O v4.2.70",
 		"version":"2.0"
 	},
 	"scene":0,
@@ -43,11 +43,14 @@
 			"doubleSided":true,
 			"name":"Denim.001",
 			"pbrMetallicRoughness":{
-				"baseColorTexture":{
-					"index":1
-				},
-				"metallicFactor":0.14664410054683685,
-				"roughnessFactor":0.8888888955116272
+				"baseColorFactor":[
+					0,
+					0,
+					0,
+					1
+				],
+				"metallicFactor":0.8578431606292725,
+				"roughnessFactor":0.8676470518112183
 			}
 		}
 	],
@@ -77,10 +80,6 @@
 		}
 	],
 	"textures":[
-		{
-			"sampler":0,
-			"source":0
-		},
 		{
 			"sampler":0,
 			"source":0