I have been battling with this for some time. How for example would I render an LED display, such as found on a typical clock radio etc. I have made a block, and made it grey plastic, and extrude cut the shapes of the segments thru it. From the same sketch I have extruded a 1mm deep front and turned off merge result, this body I am trying different transparent, translucent and even dilectric materials on, with either them looking like glass where you can see into the display, or else it not being illuminated from the point lights I have placed within the recessed in the main body I have made. I also would like to know how to have for example an LED illuminating a small translucent window in the body of something, for example the activity LEDs on a switch or router where the LED isnt visable, just its glow on a sticker over a hole in the casing. Im getting the feeling that this is somethign that photoworks does not excel at, but I am sure there must be a way to do this.