Of course, you could always just model in black and white (grey tones actually). Now, before you snort in derision and suggest I might need more ventilation at my modeling bench… this approach has been seriously proposed by at least one
modeler. I have not heard if they even managed to execute it, as it would be potentially very challenging.
Years ago, a small module done this way was exhibited at an NMRA regional contest, and maybe at the National the same year. I can’t remember the modeler or the year. Maybe someone on the list will remember more specifics.
