One of the most emblematic Payday 2 modders, I am not a spy..., has released a new tool that can import and export models in the Diesel engine.
[A link to the tool's in-depth description can be found here.](http://www.lastbullet.net/r/diesel_tool/ "")
Customization was a bit limited in Payday, mods were mainly sounds and textures. With the addition of models, this opens a wide range of possibilities.
This also means that Payday characters and objects will probably end up in GMOD and SFM, for your animating pleasure.