If you want to reduce the laser speckle of your triple laser projector to almost zero while gaining the benefits of an ambient light rejecting screen, then I think the best screen material is a lenticular ALR screen made for ultra-short throw projectors. While I think standard throw lenticular screens could be a great product in the future, the current generation just doesn’t seem to perform as well as it should and isn’t available in as many form factors. Compared to the new standard throw lenticular screens, the UST versions have less hotspotting, less laser speckle, better uniformity, and are available in significantly more form factors.
