
How did they do the outline shader in Spirit Crossing?
Around a year ago I tried to develop a screen-space outline shader for a game I was working on. What I could not figure out was how to keep it from flickering in between frames when moving the camera. The usual games like Sable have very severe flickering and it gives me a headache.
Now a few days ago I saw and played the demo of this game: https://store.steampowered.com/app/2321960/Spirit_Crossing/
They somehow solved this and have near zero flickering? How? Can anyone tell me what they did different? I would guess it might be a mix of supersampling, blurring, maybe SDF?
I want to create the shader.