This mod adds a button that will put a landfill tile under every entity if you have a blueprint in hand. Very useful for complex reactor setups and blueprinting rail.
When using this mod to landfill under circular rail, the corners are sometimes not filled and the rail cannot be placed when the landfill is built, because the landfill isn't covering enough area for the game to place curved rail. A full circle usually does it, but there seems to be an alignment issue.
Sorry for the late reply - no, I don't have a BP anymore, however, I found that when using the rail planner, factorio sometimes plans curves that later can't be built because water is in the way, so this is likely a bug in factorio, as it affects the ghost rail planning as well.
