diff --git a/UnitySDK/Assets/TiltBrush/Scripts/Gltf/GltfMaterialConverter.cs b/UnitySDK/Assets/TiltBrush/Scripts/Gltf/GltfMaterialConverter.cs
index 5acce7a6..10edb301 100644
--- a/UnitySDK/Assets/TiltBrush/Scripts/Gltf/GltfMaterialConverter.cs
+++ b/UnitySDK/Assets/TiltBrush/Scripts/Gltf/GltfMaterialConverter.cs
@@ -256,6 +256,8 @@ private static Material LookUpGlobalMaterial(GltfMaterialBase gltfMaterial) {
       string alphaMode = gltfMat.alphaMode == null ? null : gltfMat.alphaMode.ToUpperInvariant();
 
       switch (alphaMode) {
+      case null:
+      case "":
       case Gltf2Material.kAlphaModeOpaque:
         baseMaterial = gltfMat.doubleSided
             ? TbtSettings.Instance.m_BasePbrOpaqueDoubleSidedMaterial
diff --git a/UnitySDK/Assets/TiltBrush/Scripts/Gltf/ImportGltf.cs b/UnitySDK/Assets/TiltBrush/Scripts/Gltf/ImportGltf.cs
index 40045241..d5d9a7e2 100644
--- a/UnitySDK/Assets/TiltBrush/Scripts/Gltf/ImportGltf.cs
+++ b/UnitySDK/Assets/TiltBrush/Scripts/Gltf/ImportGltf.cs
@@ -351,6 +351,12 @@ static bool GetBlocksVersion(string generatorString, out Version version) {
       version = new Version { major = 1, minor = 0 };
       return true;
     }
+    // Likely it's "glTF 1-to-2 Upgrader for Google Blocks"
+    // No other Blocks version info, so assume 1.0
+    if (generatorString.Contains("Google Blocks")) {
+      version = new Version { major = 1, minor = 0 };
+      return true;
+    }
     version = new Version { major = 0, minor = 0 };
     return false;
   }