A height map is a grayscale map that stores the relative height of the source object when you render with normal projection.
You can use the height map as a displacement map on the target object. This is a way to add detail to the edges of the low-resolution object, because edges are not affected by the normal bump map itself.
Tip: Using a paint program such as Adobe Photoshop on a height map is possible, but prone to error. The values in the height map depend on the shapes of both the low-resolution and high-resolution models, and it's easy to damage the mathematical accuracy. If you paint any changes onto the map, be careful to preserve the faceted look, and avoid the temptation to blur away the facets. You might try painting in Additive or Subtractive mode, to add to or subtract from the displacement, because Normal mode will set a fixed displacement, making it difficult for an artist to control the result.
Selected Element Unique Settings
There are no unique settings for a height map.