Height Margin

Set a distance for deciding that 3D points which are in the measure area and are higher than the plane to decide obstruction are on other obstructing object or not. If a 3D point is more than this margin value away from the plane to decide obstruction in the Z positive direction, it is regarded as an obstructing point.
If the [Plane Height Offset] is set to 0.0, the plane to decide obstruction is completely same as the plane measured by specified Plane Tool. If the [Plane Height Offset] is set to a value other than 0.0, the plane to decide obstruction is shifted from plane measured by specified Plane Tool in normal direction to the plane.