Height Map

Blending objects with textures associated with a height map also known as terrain blending is a method to make objects placed on a height map surface appear seamlessly blending with terrain texture (with assumption height map is representing a terrain model). Blending simulates an under and overgrowth of terrain which would occur in nature.

Set up for Height Map Blending

Height map surface must have both Texture Array and Tri-planar mapping features enabled. Select height map surface as Surface A and object(s) to be blended as Solid A. Open dialog from menu and tab to . Check "Blend with height map surface" to enable feature, move/position selected object(s) on height map as desired.

Note: When blending is enabled height map surface and objects will have their select color highlights removed to show blend effect while remaining selected.
Note: Blending Height map surfaces with another height map surface is not supported.

Configuring Height Map Blending

Feature	Description
Blend Height	Distance above height mapped surface terrain texture appears on an object, this is the overgrowth
Blend Falloff	Factor to adjust how terrain texture accumulates over distance
Blend Base	How much underlying terrain appears around base of an object as it intersects with height map surface, this is the undergrowth
Blend Normal	Determines which object surfaces are blended based on their surface normal direction relative to the height map surface.
Blend Mode	Texture blending mode to use
Blend Factor	Adjusts computed factor based height distance used for blending textures.
Instances use single height reference	A single height reference is computed once for each instance object instead of per-vertex. Intended for small instance objects reduce to per-vertex processing.

Blending Examples