Hi-Res Images at Natural Size?

[Scott Rossi]

I hope I'm missing something with regard to displaying hi res images in a
mobile (iOS) stack...


If one has a mobile stack built at "natural size" (say 320 x 568, iPhone
5), is it possible to display hi res images in the stack without resizing
the stack?

I have an image that's saved at double the stack resolution (say 640 x
640), but no matter what I try, I can't seem to scale the image down to
fit the stack while maintaining its "hi-resiness" -- the image always
appears soft.  I'm wondering if this is because LC is scaling the stack to
fit the screen, so regardless of resizeQuality and original resolution,
the image is displayed upscaled?  Is there some combination of the dozen
or so screen-mobile-pixel-density-factor-scaling properties that I'm
missing?

Am at loss -- thanks for any suggestions.

Regards,

Scott Rossi
Creative Director
Tactile Media, UX/UI Design