these are models or -to be more precise- effects that are included in Dark Messiah: Might&Magic. if you own the game and have it mounted to gmod you can browse for the word "lux" or "ray" in the ingame search tab.
well i can't find the jhen model. you could browse for the word "monster" on garrysmod.org by yourself though. Because almost every other monster hunter port is listed there. the horkers are in this awesome pack:
yeah! thanks! just because some people making some casual gunposes doesn't mean, you can't do more with gmnod! be creative! use it, have fun and explore new ways to make a pic. because the ingame tools are realy powerful and easy to use.