-High Def. Models,as well "Animated" -Advanced and,or Awesome Looking "Materials" *optional -Cinematic "Lut" (Look up Table) -"RD-Textures" and,or "PBR-Textures" in 4-8k**!! the "dpi" should be arround 100-500 *optional,you can assign them to a color profile,like Adobe 1998 -Customized,Great Looking"Particle System" *optional -"Vehicles" avoid models with multiple Material slots *optional driveable! -"A Scene" of yours,but with a certain Quality..
///// All this assets,Should be Packaged in a "upk. File"! /////
in order to save time for the artist (Launching 3dsMax+converting it to FBX 2013+Smooth Groups+Export+Import in UDK).
..but you can also provide a link.
Don´t forget the the name of the source or the artist!!