Creating a Heightmap

The heightmap is essentially a black and white image that contains elevation data for your map. It is important to spend a bit of time on the heightmap before you even work on the level in the Dev Kit, because it's often quite large and difficult to edit later and still keep it looking natural.

We highly suggesting using 3D Heightmap generation tools to construct your heightmap. Some popular tools are World Machine, World Creator, Gaia, and Blender.

Here is the official Unreal Engine documentation about Heightmaps. https://docs.unrealengine.com/4.27/en-US/BuildingWorlds/Landscape/TechnicalGuide/

Here is an awesome guide explaining what a heightmap is. https://www.worldofleveldesign.com/categories/ue4/landscape-heightmap-guide.php