Looking for info regarding Quixel Mixer and Source Game Engine

So I’m trying to get some info regarding Quixel Mixer but when I click on their forum I’m being directed here for megascans, I don’t really care for any of that other than being able to make game textures.

I was wondering if anybody could direct me to info regarding exporting assets to something other than unreal or unity? Note: I’m working with a game that uses a modified version of Valve Source Engine 2013 so I’m hoping to get a consistent way of exporting from mixer to the texture/file format needed for the game I’m making stuff for