I have just released the first video in a series that will walk you through the steps of creating your own custom perk for BO3! All 5 scripting videos will go live today (some of the scripting is rushed because I didn't want the videos to be excessively long, it's not a scripting tutorial after all). This playlist will be live permanently and possibly updated to be more thought out and concise. The modelling videos will go live some time in the following weeks.

https://youtube.com/playlist?list=PLmhgzp9YqwUsTmDEDqgXGN1XxvPhpBxMU