@M4J0R-3RR0R(View Post) If you have a more than 2px wide beam, you can use PCLN as filling because it doesn't do anything when heated/cooled and it passes photons through even when inactive. Just make sure to create it away from your photon cloner and not to activate it! You can cool it the old-fashioned way which basically is a heat conductor frame with some LN2 inside and a few pix of VOID to keep it draining. Or you can use the new way, using a heat conductor frame filled with STAN(frame must have a more than 3x3 empty rectangle inside)