I won't link for obvious reasons but typing in the Last of Us (a video game from Naughty Dog) or The Walking Dead (the Talltale game based on the AMC show) on any porn website gives you videos of the child protagonists in those games being raped. Dozens of videos. For example in the game the Last of Us Sarah is 12. She is the main characters Joels Daughter who dies during the zombie apocalypse. Using Valves Source Film Maker (SFM) they are ripping the models from the video games and using them to create CP. This is a legal way for them to create child porn as it's animated and it's completely sick.

Same with Talltales The Walking Dead Clementine. They took the child model from the game, a 9 year old, and she is in dozens of videos being raped.

I'm not sure how to give examples for this one so I'll link to a normal YouTube video. People like to use Valves SFM to create interesting mini movies using video game characters. Here is one using Overwatch.

https://www.youtube.com/watch?v=uZlIlwHimGw

https://en.wikipedia.org/wiki/Source_Filmmaker

https://store.steampowered.com/app/1840/Source_Filmmaker/

This same program is being used to create child porn.