From c3a7f59ec1bcf33cf2c532d035e2c689c852150b Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 27 Jul 2024 16:18:15 +0300
Subject: [PATCH] Skip empty material slots on a Mesh

They may occur if materials are intended to be supplied by the object
instead of the mesh.
---
 blender/io_mspgl/mesh.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/blender/io_mspgl/mesh.py b/blender/io_mspgl/mesh.py
index 8ad77bda..c0d9c11b 100644
--- a/blender/io_mspgl/mesh.py
+++ b/blender/io_mspgl/mesh.py
@@ -194,6 +194,8 @@ class Mesh:
 		has_normal_maps = False
 		splat_material = None
 		for m in self.materials:
+			if not m:
+				continue
 			mat = Material(m)
 			for p in itertools.chain(mat.properties, *(s.properties for s in mat.sub_materials)):
 				if p.tex_keyword=="normal_map" and p.texture:
-- 
2.45.2