Hold Alt to ignore collision when building with the Hammer or block items.
Aidanamite has expanded on this idea with an amazing mod here! As always many kudos to them and happy building to you all.
If you just want to overlap tiles then this mod is still staying up and has been tested in version 13.
Default Key - Alt (Not customizable for now)
Pipes don't connect when placed after blocks so the pipe network must be built before being covered by other blocks.
Seems like saves are stable with overlapping blocks, but I would still backup your save in case things like overlapping pipes aren't handled gracefully.
Can be unloaded without breaking your builds and overlapped objects will stay overlapped.
Description last changed on 2021-06-23