fix: match Cesium intersection asphalt

blender/osmassets/catalog.py

@@ -29,7 +29,7 @@ ROAD_LAYERS = [
     {"id": "road_surface", "material": "Road Asphalt",
      "color": (0.055, 0.065, 0.070), "z": 0.03},
     {"id": "intersection_surface", "material": "Intersection Asphalt",
-     "color": (0.065, 0.075, 0.080), "z": 0.035},
+     "color": (0.055, 0.065, 0.070), "z": 0.035},
     {"id": "sidewalks", "material": "Sidewalk",
      "color": (0.49, 0.51, 0.49), "z": 0.065},
     {"id": "sidewalk_corners", "material": "Sidewalk Corner",

blender/tests/test_pure.py

@@ -30,12 +30,23 @@ from osmassets.geom import (
     sample_tree_row,
     signed_polygon_area,
 )
+from osmassets.catalog import ROAD_LAYERS
 from osmassets.osm import Projector, parse_height, parse_osm, tags
 
 
 SQUARE = [(0.0, 0.0), (10.0, 0.0), (10.0, 10.0), (0.0, 10.0)]
 
 
+class RoadLayerCatalogTest(unittest.TestCase):
+    def test_intersection_and_road_asphalt_share_the_same_colour(self):
+        layers = {layer["id"]: layer for layer in ROAD_LAYERS}
+        self.assertEqual(layers["road_surface"]["color"],
+                         layers["intersection_surface"]["color"])
+        # They remain distinct meshes so the intersection stays above the road.
+        self.assertNotEqual(layers["road_surface"]["z"],
+                            layers["intersection_surface"]["z"])
+
+
 class GeometryRingsTest(unittest.TestCase):
     def test_polygon_keeps_only_the_exterior_ring(self):
         geometry = {"type": "Polygon", "coordinates": [["outer"], ["hole"]]}