[Feature request] Specify output level.

[GraxCode]

As far as I know this is not possible currently.
I basically want to change a level using a SPWN script.
Currently, it will overwrite the input level after the script ran over the level. Now, if I want to change the script, the input level (which is also the output level) has already changed and the script can therefore not work properly. I know there is group 1001 (every generated object by SPWN will have it, and get deleted on re-run), but let's say I want to transform a level into a designed version of it self, what would I do with the original level objects? I would need to make them invisible. It would be much more convenient to be able to specify a level where it should be output to.

[SpeckyYT]

spwn doesn't modify objects that are already present the level, spwn can only add new objects.

[SpeckyYT]

You can perfectly restore the level by building an empty script