FroyokSo Ombre development enters its third year this month, so let's start a new thread to track the progress !
I spent the past few days reworking my Depth of Field, which started off the GPU Zen method and then evolved a bit.
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). 🤔
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
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.
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.)
I made an in-editor tweak to change the resolution, this way I could try out different bokeh sizes and sample count.
That made it easier to figure out how to make the bokeh stable across different resolutions. (My bloom isn't it however, so I will have to look into it.)
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
So it was juts a silly bug, I had the IOR for the Material and the Air swapped around, so I had the wrong value. 😅
Alright, with that last new feature in I backed the project up and I can now increment the engine version. That's a good milestone. :)
So initially I was thinking of jumping onto Steam Audio as the next topic, but recent discussions are now tempting me more to go into Global illumination instead. 👀
Not sure which method I want to dive into yet. I have been gathering information about different methods (Light Propagation Volume, Distance Field, Voxels) but I'm still hesitating on which one would fit best my needs.
DDGI is another potential solution, but building and updating a BVH is not necessarily something I would like to do. 🤔
Sylvain Meunier@froyok Radiance Cascades from Path of Exile 2 looks trendy... ^^
@meuns PoE2 Radiance Cascade only works for screen space stuff, the world space version is a lot more costly (and folks are still working on it). I'm looking for cheaper stuff, even if less precise. :)
@froyok a global illumination method from the trenches https://youtu.be/57F1ezwH7Mk?si=SQo0sdtTuDx8n1mv
