We personally haven't experimented with this. Is your intention to have someone use the zSpace like normal, but also have a second stereo image projected for spectators? I know there are consumer-grade 3d projectors on the market. I wouldn't expect our AIO models or FirePro and Quadro graphics cards to output to two quad-buffer displays simultaneously. If the projector accepts input types like side-by-side or checkerboard style stereo image input, then it might be possible. Again, we haven't tested something like this, so you'll be in uncharted territory.