I'm was looking (still looking actually) for a virtual camera for GNU/Linux, but all the solutions I found involve lot of hacks.

That would be awesome to be able to switch scenes from OBS inside a "corporate" video conference setup.

I've done it without too much trouble. I did have to compile and load a small kernel module, but it wasn't too hard. I have notes on how I did it if you're interested. Most of my time was spent in OBS tweaking the look.