source/blender_manifest.toml

@@ -1,7 +1,7 @@
 schema_version = "1.0.0"
 id = "web3d_x3d_vrml2_format"
 name = "Web3D X3D/VRML2 format"
-version = "2.3.3"
+version = "2.3.4"
 tagline = "Import-Export X3D, Import VRML2"
 maintainer = "Community"
 type = "add-on"

source/import_x3d.py

@@ -1979,16 +1979,37 @@ def importMesh_IndexedFaceSet(geom, ancestry):
 
         color_per_vertex = geom.getFieldAsBool('colorPerVertex', True, ancestry)
         color_index = geom.getFieldAsArray('colorIndex', 0, ancestry)
+        has_color_index = len(color_index) != 0
+        has_valid_color_index = index.count(-1) == color_index.count(-1)
 
         d = bpymesh.vertex_colors.new().data
-        if color_per_vertex:
+
+        # rebuild a corrupted colorIndex field (assuming the end of face markers -1 are missing)
+        if has_color_index and not has_valid_color_index:
+            # remove all -1 beforehand to ensure clean working copy
+            color_index = [x for x in color_index if x != -1]
+            # copy all -1 from coordIndex to colorIndex
+            for i, v in enumerate(index):
+                if v == -1:
+                    color_index.insert(i, -1)
+
+        if color_per_vertex and has_color_index: # Color per vertex with index
             cco = [cco for f in processPerVertexIndex(color_index)
-                       for v in f
-                       for cco in rgb[v]]
+                   for v in f
+                   for cco in rgb[v]]
+        elif color_per_vertex: # Color per vertex without index
+            cco = [cco for f in faces
+                   for (i, v) in enumerate(f)
+                   for cco in rgb[i]]
         elif color_index:  # Color per face with index
             cco = [cco for (i, f) in enumerate(faces)
                        for j in f
                        for cco in rgb[color_index[i]]]
+        elif len(faces) > len(rgb):  # Static color per face without index, when all faces have the same color.
+            # Exported from SOLIDWORKS, see: `blender/blender-addons#105398`.
+            cco = [cco for (i, f) in enumerate(faces)
+                       for j in f
+                       for cco in rgb[0]]
         else:  # Color per face without index
             cco = [cco for (i, f) in enumerate(faces)
                        for j in f