io_scene_fbx/import_fbx.py

@@ -1961,6 +1961,14 @@ def blen_read_shapes(fbx_tmpl, fbx_data, objects, me, scene):
         if len(vgweights) == 1 and nbr_indices > 1:
             vgweights = np.full_like(indices, vgweights[0], dtype=vgweights.dtype)
 
+        # Special case for trimmed weights with trailing zeroes
+        if len(vgweights) != nbr_indices:
+            # Pad with zeros
+            new_vgweights = np.zeros_like(indices, dtype=vgweights.dtype)
+            n = min(len(vgweights), nbr_indices)
+            new_vgweights[:n] = vgweights[:n]
+            vgweights = new_vgweights
+
         assert(len(vgweights) == nbr_indices == len(dvcos))
 
         # To add shape keys to the mesh, an Object using the mesh is needed.