Places all of the objects positions at the heightmap level.
When working with Objects or Trees outputs, that have Relative Height feature it might seem that the objects are placed on the ground level by default. However, object nodes have no data about terrain height unless they are output with Objects/Trees output or floored with the Floor. Objects height is zero by default.
Floor generator might be handy if you'd like to place objects with the height that is not related with the terrain. You can input any map as a node heightmap, including the one that won't be output to the final terrain:
- Relativity: in Absolute mode the final object height is equal to the terrain height at it's position, no matter of the previous object height. In Relative mode the terrain height is appended to object position: for instance, if some Adjust node sets it height to 10, and then Floor with terrain height 20 is applied, the final object height would be 30.