This pack has been worked on for quite some time, I have worked on it off and on for about a year prior to making it's thread. That time was spent working on ideas and execution as well as making the textures themselves. I have made many texture packs before, and it has become a hobby of mine, but few of the packs I make I feel are release ready. This pack was one I liked and one I thought from early on that I would release.
More screenshots can be found on the official thread here:
http://www.minecraftforum.net/topic/1511349-64x-wip-162-definitance-resource-pack-ready/