BACKZ System Variable

(Read-only)
Type:	Real
Saved in:	Drawing
Initial value:	0.0000

Stores the back clipping-plane offset from the target plane for the current viewport, in drawing units. Meaningful only if the back clipping bit in VIEWMODE is on. The distance of the back clipping plane from the camera point can be found by subtracting BACKZ from the camera-to-target distance.