I know this is an old thread, but I've had people asking me if this is possible to do in 3DGS.

So here's my test scene with red/cyan. I also noticed that the 3D effect is more impressive when the scene is actually moving.
And that if I convert the screenshot to Jpeg, the scene gets about have as deep as it is now. So compression is a bad idea.



I also noticed that it depends on the screen and especially on the color 'temperature' setting.
So it would be great if the user could adjust the darkness of the red and blue amount until one eye can only see one or the other, and not a faint ghost image of the other.

Great contribution though, really love it...