Clip Studio Paint 3D models, selfies and... Sims poses
the great thing about Sims is that you can build the exact scene you need (including stuff such as hair, furniture and clothes) instead of having to figure out everything on your own and/or spending ages setting everything up like with CSP models: although sims hair tend to be pretty stiff and don't have physics, it's still incredibly useful to have a model with actual hair and clothes on, especially if you're working with odd angles. The Sims 3 also allows you to customize the color of your furniture, easily change the placement of lights and a whole bunch of other little adjustments that make the process much faster
granted, you WILL still need to make your own adjustments: the perspective can get a little odd from certain angles (and The Sims 4 seems to be even worse with that) so you can't exactly trace a model as it is and call it a day, but I still find it to be a super useful and very easy tool to work with!