well, considering the amount of variations on the double slit experiments that have been tried and the number of times it has been repeated, i would say its probably worth a try
i.e a vacuum tube. using the gate in a triode to adjust the amplification of the electrons. i guess you would have to have a photographic plate attached to the anode but this shouldnt effect the operation of the valve. just a thought... not sure where you would put the detector, maybe it would...
or even a percentage of it. i know this is more of a philosophy question but could it be like a holodeck, where the gravity, floor and walls are real but the rest of it is a simulation? (this is a metaphor of course.) so space and gravity as an example are a simulation but consciousness and...