This is not a SFW instance. NSFW communities will be tagged, and efforts will be made to keep SFW communities clean, but proceed at your own comfort level.
CD Projekt Red is working with the creator of one of The Witcher 3’s biggest graphics mods, with his work set to be officially included in the game’s upcoming remaster.
The level editor was used out of convenience. There are other level formats they could have used instead.
Portal is a great example of Valve supporting education, not the mod scene.