I do not see there is a cut-off point of our power of cosnciousness. Its fun bar talk but useless. No-one will be able to prove once and for all that idealism or materialism is correct. And lots more. This is just another myth.
Physical things have only formal definitions.
Therefore they are only constructs and fictions. A lot of energy has been expended on this discussion in attacking and defending a fallacious argument for mental monism. In fact this argument proves nothing. All it buys us is a sense of the plausibility of mental monism. To get a proof of mental monism, you have to use the full linguistic argument, of which I gave a too-brief sketch above.