The part I'm currently trying to figure out is how to make the effect "scale-up", aka resolution independent.
Since the kernel is computed on the fly from a function, I should be able to find a formula to adjust it based on a resolution reference (so via a ratio or something). 🤔

My bokeh pass shader on Linux has a little issue it seems. For some reason it result in my pass taking 0.7ms, but if I increase the number of samples it actually goes down !
Switching to Vulkan or another shader compiler fix the problem. That was a fun one to investigate. :p

While trying some different bokeh radius, I thought of scaling up/down the render targets resolution and it worked without changing anything... this means I could have dynamic resolution scaling !

Here is 1080p x 2, aka 4K.
That's basically SSAA(2x) ? :D
Still hitting 80 FPS, but the post-process stack and shadow volumes are getting quite expensive at that resolution.

(Some stuff is broken obviously, like the tiny and wrongly placed viewport axis.)

So the past few weeks I have been working on my refraction implementation and I'm finally starting to get some good results. I also added absorption which is going to be nice for liquids and colored glass.

I'm struggling with a specific point however. I have read that glass IOR should be around 1.5 for example, but when I use such value then I get this kind of double layering:

I tried looking around, to see if I was missing some notion, but even with a simple shadertoy I get the same result: https://www.shadertoy.com/view/ttBBWz

Same with this one, IOR of 1.5 gives the same warping/duplicated result: https://www.shadertoy.com/view/4lB3D1