Anyway ... I was wondering if mods that let you work in build mode out of the original workshop boundaries, (not using a scraping mod) just using vanilla and scrapping stuff like trees and logs that you can normally scrap in the settlement ... break precombines?
I don't know of any that break precombineds, but as a result they don't enable scrapping of things that are part of a precombined mesh. You can use the bUseCombinedObjects=0 ini edit to globally break precombineds so you can scrap anything, but that is risky since
- you will now be able to scrap the walls of interior cells
- it doesn't break previs (occlusion culling), so scrapping large objects like buildings, privet hedges, trailers, etc... will result in occlusion bugs. bUsePreCulledObjects=0 will disable previs and fix that issue, but it will even further worsen the performance impact, and for some interior cells it will introduce occlusion bugs (even when nothing is scrapped) as some interiors have really bad room bounds and portals (old occlusion system used in previous games, re-enabled when previs is disabled).
If you want to enable scrapping everywhere that is safe, I recommend Geth7n's mod. For compatibility, it would probably be best to place his plugin mod at the top of your load order, and use the xEdit script to apply the edits to any CELLs overridden by other mods (that way, any mods relying on edits to the CELL record would still work).