With parts the calculation is more accurate.
parts are very suitable for prefab buildings

Converting a roof with slopes into parts is only possible if it has a single slope. But most roofs have multiple slopes. That is why the roof must be divided first.
1. Requested a new function that divides the roof in multiple parts
Converting walls to parts is only valid if they are not connected to the floors. The walls must therefore first be separated from the floors with Unjoin
2. Requested a new function that divides the wall in multiple parts
Accurate calculation and prefab building in a limited number of clicks