I have three texture mapped objects in a scene. The rendering of each needs to effect just one color channel of the final image. I’m currently able to accomplish this by assigning each to a separate render layer and combining them the compositor. Is it possible to achieve this with just shader logic?
The hope is to produce a reasonable looking image in the 3D view.
The objects are currently using Emissive Transparent materials to give “Shadeless” behavior.
An example blender file is available at: https://github.com/BrianSwift/JunoCam/blob/master/Juno3D/P00_102c.blend
Additional solutions that work in BI or EEVEE would are also appreciated, but Cycles is needed because BI doesn’t have the equirectangular (panoramic) camera model.