+ material_map = None
+ mapped_count = sum(m.render_mode!='EXTERNAL' and m.material_map for m in l.data.materials if m)
+ if mapped_count:
+ mmk = lambda m: m.shader if m.render_mode=='CUSTOM' else ""
+ material_map_key = mmk(l.data.materials[0])
+ key_mismatch = any(mmk(m)!=material_map_key for m in l.data.materials)
+ if mapped_count!=len(l.data.materials) or key_mismatch:
+ raise Exception("Conflicting settings in object materials")
+
+ if material_map_key in material_maps:
+ material_map = material_maps[material_map_key]
+ else:
+ material_map = create_material_map(context, l.data.materials[0])
+ material_maps[material_map_key] = material_map
+
+ tech_name = "{}.tech".format(material_map.name)
+ if tech_name not in resources:
+ material_map_export.export_technique_resources(material_map, resources)
+ resources[tech_name] = material_map_export.export_technique(material_map, resources=resources)
+ elif l.material_slots and l.material_slots[0].material:
+ material = l.material_slots[0].material
+ if material.render_mode!='EXTERNAL':
+ tech_name = material.name+".tech"
+ if tech_name not in resources:
+ material_export.export_technique_resources(material, resources)
+ resources[tech_name] = material_export.export_technique(material, resources=resources)
+ elif "stub.tech" not in resources:
+ resources["stub.tech"] = self.export_stub_technique()
+