How to build a level designer

Thanks for the replies.

I’ll add some more details

  1. I want to have a grid based “floor” for placing my buildings (Unreal Engine City Building Game - The Grid - EP 5 - YouTube)
  2. My buildings aren’t all the same size, they have small(10x10), medium (15x15) and large (30x30). That tells me my tile size is going to be 15 because there will be a little space on the 10x10 but it will also work for 30x30 (some complexity that the large building must snap to corner of the 15x15 tiles rather than the centre need to be solved, I might just add a fake mesh in blueprint and off-centre the bigger buildings) OR I think I can use the snap to grid WTF Is? Snap to Grid in Unreal Engine 4 ( UE4 ) - YouTube to do that depending on the “building” I’m painting.
  3. The above is entirely speculation so I’m keen to see if someone has done this? or similar