The picture above was made with this demo POV file and this shower valve object POV file . This object is loosely based (visual, no measurments) on the SigmaTherm thermastatic shower valve by Sigma Faucets. It consists of a temperature adjustment, and two valves for controlling a tub filler and showerhead (for example). ... The valve lies on the Z=0 plane, and extends out in the positive Z direction, by 2.86 units to the central knob. ... The back plate of this valve is 8 units in diameter. ...