have you gone this many years and not learned how to apply spray sunscreen?

It is knowable. You just don’t know it.

This only shows things I’ve explicitly hidden.

I have never had the top layer curl in any print and monotonic infill looks almost like it is ironed, so I’m skeptical about your claim that you required hilbert curve for some reason. It seems more likely to me that something is wrong with your printer, but of course I give you the benefit of the doubt.