public float Softness { get; set; }

Public Property Softness As Single
	Get
	Set

public:
property float Softness {
	float get ();
	void set (float value);
}

member Softness : float32 with get, set

Property Value

The softness of the billboard:
0 ... Disabled: The billboard is rendered with hard edges.
-1 or NaN ... Automatic: The thickness of the billboard is determined automatically.
>0 ... Manual: The value defines the thickness of the billboard (= soft particle distance threshold).

The default value is 0.

Reference