Paradox Illusions - Penrose triangle optimised

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This is a remix of Tomonori's Penrose triangle. The changes are:
* Parts that are hidden anyway when viewing from the correct angle for the illusion, have been removed. This means a quicker print, less material, and a more puzzling shape (it isn't obvious how this could represent a triangle when not viewed from the right angle).
* Default size scaled to 75%.
* Offered in two versions: one to be viewed from a short distance (about the same as the original), and one from a farther distance. Use the far version for smaller prints, and the near version for larger prints.
* Nearly all of the slanted overhangs have been exchanged for one obvious horizontal overhang that _will_ require support material. I know supports are disliked by many (including me) but in this case it does make the print less difficult. The phot