Hi @dskeith thanks for reaching out us.

As pointed out by @PluginStudent, the NBIT_SOLO_LAYER behavior is explained in the Layer Manuel although it make sense to add a note to the Python API as well.

With regard to a complete example, I've partially reworked your code to make sure that by executing the script multiple times you can run across all the solo configurations that the scene can handle.

import c4d # Main function def main(): layer_root = doc.GetLayerObjectRoot() if not layer_root: return # Get the first layer in the scene layer = layer_root.GetDown() if not layer: return soloSet = False while layer is not None: # Set `rawdata` to True flag so to get the original layer values without any additional global changes layer_data = layer.GetLayerData(doc, rawdata=True) # check the current layer solo state: if layer_data["solo"] == False: # if not "solo" then set to True layer_data["solo"] = True # update the layer layer.SetLayerData(doc, layer_data) # update the flag soloSet = True break # deactivate if layer solo was True layer_data["solo"] = False layer.SetLayerData(doc, layer_data) # go to next layer layer = layer.GetNext() # if one (or more) solo was set the set NBIT_SOLO_LAYER otherwise clear if soloSet == True: doc.ChangeNBit(c4d.NBIT_SOLO_LAYER, c4d.NBITCONTROL_SET) else: doc.ChangeNBit(c4d.NBIT_SOLO_LAYER, c4d.NBITCONTROL_CLEAR) # Add an event c4d.EventAdd() # Execute main() if __name__=='__main__': main()

Cheers

How about updating ResEdit..?