+ material_atlas = None
+ atlas_flags = [m.render_mode!='EXTERNAL' and m.material_atlas for m in l.data.materials if m]
+ if any(atlas_flags):
+ mmk = lambda m: m.shader if m.render_mode=='CUSTOM' else ""
+ material_atlas_key = mmk(l.data.materials[0])
+ key_mismatch = any(mmk(m)!=material_atlas_key for m in l.data.materials)
+ if not all(atlas_flags) or key_mismatch:
+ raise Exception("Conflicting settings in object materials")
+
+ if material_atlas_key in material_atlases:
+ material_atlas = material_atlases[material_atlas_key]
+ else:
+ material_atlas = create_material_atlas(context, l.data.materials[0])
+ material_atlases[material_atlas_key] = material_atlas
+
+ tech_name = "{}.tech".format(material_atlas.name)
+ if tech_name not in resources:
+ material_atlas_export.export_technique_resources(material_atlas, resources)
+ resources[tech_name] = material_atlas_export.export_technique(material_atlas, 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()
+