Terrain.shadowCastingMode

Switch to Manual
public Rendering.ShadowCastingMode shadowCastingMode ;

Description

Allows you to set the shadow casting mode for the terrain.

ShadowCastingMode enum defines how and if shadows are cast from this object. Typically shadows are either cast or not, but it's also possible to make shadows two-sided (useful for otherwise single-sided geometry) or make a shadows-only object (that is otherwise invisible in the Scene, but casts a shadow).