Using a new theory producing method, dubbed “RM”, and a new ontology, Affectance Ontology, I hypothesize that if the inner surface of the double-slit screen was altered to a specific surface shape, particles would no longer create a significant interference pattern, but waves still would. Since a photon seems as a particlized wave, I suspect that photons would show little difference from their typical interference pattern, as their inherent wave properties would still have predominate effect. But if they also stopped showing the interference pattern, it would indicate that photons really are strictly particles.
Note that the inner walls of the screen must be randomized in height such that its greatest height is equal to or greater than the expected largest interference pattern wavelength. All inner walls should have a random surface. It would be good if the display screen was also shaped similarly, but such should not be necessary.