diff --git a/cjio/convert.py b/cjio/convert.py
index 521c8d2..3b5c607 100644
--- a/cjio/convert.py
+++ b/cjio/convert.py
@@ -367,9 +367,9 @@ def to_glb(cm):
     materials = [
         {  # building red
             "pbrMetallicRoughness": {
-                "baseColorFactor": [1.000, 0.000, 0.000, 1.0],
-                "metallicFactor": 0.5,
-                "roughnessFactor": 1.0
+                "baseColorFactor": [0.7200, 0.320, 0.220, 1.0],
+                "metallicFactor": 0.0,
+                "roughnessFactor": 0.0
             }
         },
         {  # terrain brown
diff --git a/tests/test_convert.py b/tests/test_convert.py
index 14ada7c..0352aea 100644
--- a/tests/test_convert.py
+++ b/tests/test_convert.py
@@ -26,6 +26,15 @@ def test_debug_den_haag_glb(self, data_dir):
             cm = cityjson.CityJSON(file=f)
         glb = cm.export2glb()
 
+    def test_debug_delft_glb(self, data_dir, data_output_dir):
+        # CityJSON v1.1
+        p = os.path.join(data_dir, "0-1.city.json")
+        with open(p, 'r') as f:
+            cm = cityjson.CityJSON(file=f)
+        glb = cm.export2glb()
+        glb.seek(0)
+        with open(f"{data_output_dir}/0-1.glb", mode='wb') as bo:
+            bo.write(glb.getvalue())
 
 
 class TestB3dm: