As my second resource pack (my first is under development and won't be released to the public for a few months), I am reviving my most popular texture pack, my Halo Photorealistic. Because 256 is very resource demanding, this resource pack is 128x for more compatibility. Any lower resolution will degrade the graphics so they look like a mess of pixels. So there will be no 64x or lower. This is a work in progress, and I will be releasing updates as I go along rather than making ya'll wait a year in anticipation. I'm open to fan suggestions as well, so don't be afraid to put your ideas in the comments! Devgirl, out.

Edit:
6/30/14
This pack is compatible with Zombiecraft! This means you can shoot up zombies with awesome Halo weapons such as the Promethean Boltshot, Silenced M6C Magnum, Designated Marksman Rifle (DMR), Battle Rifle (BR), Sniper Rifle, Shotgun, MA5D Assault Rifle, and the SPNKr Rocket Launcher!
Download Zombiecraft here!