Of course, there might have been influence if the two films shared production designers (the Saving Private Ryan homage when Achilles lands at Troy is apparently because the same second unit director shot both beach landing scenes), but there isn't.

It's not most of the nudity, I am quite convinced (though I didn't immediately see the significance) that it's all. IIRC, three of the scenes of male nudity (two with Pitt, and one with Bloom) are coital or post-coital, so obviously require female presence, and also feature female nudity, though shot in such a way as to highlight the naked male and conceal the naked female (or in one case females). The other occasion is when Achilles has rescued Briseis, and changes from his armour into a shift. Wholly non-sexual, but again, a female is present.