That laser cutter sounds pretty handy for the precise tracing, but hooking it into a real‑time emotion sensor will be a pain. The key is getting the image capture fast enough to feed the laser and keep the power draw within the portable pack’s limits. Also, the paint must be conductive enough to trigger the sensor, or you’ll need a separate overlay. I’d start by testing the laser’s resolution on a small test board, then see if the emotion‑reading circuitry can keep up without lag. If it works, the mural would be a neat, but I’m wary about the power budget and potential safety concerns with a moving laser near people.