One-sided Iray Materials—how?

aaráribel caađo

I sometimes want to position a camera below a floor or behind a wall, but want to keep the geometry in place for reflections. Is there a way to set an Iray material to be one-sided, so the "out" side has the usual material settings, and the other side is ignored by the camera?

Richard Haseltine

In Iray use a section plane - Create>New Iray Section Palne Node - position it to clip the parts you want to see through, then in the Parameters pane check Clip Lights (that will make it show in relfections).