SRD_s_Chromatose__x64__1.6_.zip is a release file of the Minecraft resource pack Chromatose [x64] - Minecraft with a Painter's Touch, made for Minecraft 1.6.4. It was published on October 25, 2013 and is 16.7 MB in size. For the full description, screenshots and every other version, visit the Chromatose [x64] - Minecraft with a Painter's Touch resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.