diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/BuiltInGltfMaterialExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/BuiltInGltfMaterialExporter.cs
index 26f923b77..fe42f516d 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/BuiltInGltfMaterialExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/BuiltInGltfMaterialExporter.cs
@@ -40,6 +40,7 @@ namespace UniGLTF
                     break;
             }
 
+            Debug.Log($"Material `{m.name}` fallbacks.");
             return BuiltInFallbackMaterialExporter.ExportMaterial(m, textureExporter);
         }
     }
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/Materials/BuiltInFallbackMaterialExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/Materials/BuiltInFallbackMaterialExporter.cs
index 2eec9d260..73e093d76 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/Materials/BuiltInFallbackMaterialExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/BuiltInRP/Export/Materials/BuiltInFallbackMaterialExporter.cs
@@ -1,13 +1,18 @@
-using UnityEngine;
+using System;
+using UnityEngine;
 using VRMShaders;
+using ColorSpace = VRMShaders.ColorSpace;
 
 namespace UniGLTF
 {
     /// <summary>
-    /// 非対応のシェーダでも空のマテリアルを出力する.
+    /// 非対応のシェーダでも、baseColor だけ読み取ったマテリアルにする.
     /// </summary>
     public static class BuiltInFallbackMaterialExporter
     {
+        private const string ColorPropertyName = "_Color";
+        private const string ColorTexturePropertyName = "_MainTex";
+
         public static glTFMaterial ExportMaterial(Material src, ITextureExporter textureExporter)
         {
             var dst = new glTFMaterial
@@ -16,6 +21,20 @@ namespace UniGLTF
                 pbrMetallicRoughness = new glTFPbrMetallicRoughness(),
             };
 
+            if (src.HasProperty(ColorPropertyName))
+            {
+                dst.pbrMetallicRoughness.baseColorFactor = src.GetColor(ColorPropertyName).ToFloat4(ColorSpace.sRGB, ColorSpace.Linear);
+            }
+
+            if (src.HasProperty(ColorTexturePropertyName) && src.GetTexture(ColorTexturePropertyName) != null)
+            {
+                dst.pbrMetallicRoughness.baseColorTexture = new glTFMaterialBaseColorTextureInfo()
+                {
+                    index = textureExporter.RegisterExportingAsSRgb(src.GetTexture(ColorTexturePropertyName), false),
+                };
+                GltfMaterialExportUtils.ExportTextureTransform(src, dst.pbrMetallicRoughness.baseColorTexture, ColorTexturePropertyName);
+            }
+
             return dst;
         }
     }