Purpose: want to delete entire map but keep the natural formations like boulders, rocks, trees, etc.

Marquee selection has a filter for "buildings" and if I toggle off this filter, then boulders and rocks are not selected with the marquee selection. If I toggle the filter, then boulders and rocks are selected WITH other buildings.

Expectation: I dunno how the game classifies rocks, probably as buildings, but I think it would be better classified as props maybe. I would expect that toggle on/off "props" filter has the effect of making rocks/boulders selectable/unselectable.

Only have a few mods on:
Parallel Road Tool, Watch It!, Prevision Engineering, Loading Screen Mod, Achieve It!, Move It, Roundabout Builder, TM:PE, Picker, Hide It!.