[Feature Request] Stereoscopic Vision through split screen

[BlackLotus]

Now that VR is on the rise (like OR, Google Cardboard,Durovis Dive,...) it would be a neat feature to switch this on and off to get 3d vision you can use with your VR headset.

[SkimmingSanshiro]

there is a side by side.cg havent tried myself though

[lostfictions]

Seconding this! Mednafen VB already supports this, so it'd be wonderful to see it exposed in libretro.

[hizzlekizzle]

This is actually pretty difficult to expose via the core but, as mentioned, there's a shader, anaglyph-to-side-by-side.cg, that will convert the already-working anaglyph output to a HMD-compatible side-by-side image.