Im guessing it's possible but i cant seem to find a page on the roblox wiki on how to do it, Any help is much appreciated!
If you want to make your R15 NPC non-collidable
, go ahead and select all bodypart's of the NPC and in properties go to CanCollide and uncheck the box!
(Make sure to also select HumanoidRootPart!)
^ Hope that this will help you & that we understanded right! ^