X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=blender%2Fio_mspgl%2Fexport_object.py;fp=blender%2Fio_mspgl%2Fexport_object.py;h=6e399b0199f9f77b10175fe5a4a86027d29a88cc;hp=0e6a9022c24790e8f960e84d9ac1c5a2439ebbee;hb=7ffc6b595b9c8405d1044f8a4d4d3098392e13fa;hpb=d9d576e116507f17829af0a0d42585f9843b542e

diff --git a/blender/io_mspgl/export_object.py b/blender/io_mspgl/export_object.py
index 0e6a9022..6e399b01 100644
--- a/blender/io_mspgl/export_object.py
+++ b/blender/io_mspgl/export_object.py
@@ -105,7 +105,7 @@ class ObjectExporter:
 			progress.push_task_slice("LOD {}".format(lod_index), i, len(lods))
 
 			material_map = None
-			mapped_count = sum(m.material_map for m in l.data.materials)
+			mapped_count = sum(m.material_map for m in l.data.materials if m)
 			if mapped_count:
 				material_map_tech = l.data.materials[0].technique
 				tech_mismatch = any(m.technique!=material_map_tech for m in l.data.materials)