Here's a cheat: you can temporarily add this tag to a scenery object's config.txt
rotate-yz-range -180,180
Save and commit.
Any tilts you make will save in your route or session, even if you take that tag out or redistribute your route. However, you cannot move the object if you have taken that tag out or it will reset to the normal upright position. Also, not all objects support rolling/tilting, mainly just scenery objects.