Tomasz Stachowiak

@h3r2tic@mastodon.gamedev.place
2.1K Followers
202 Following
75 Posts

Making Tiny Glade 🏰🌿

Rustacean 🦀 Torturer of GPUs 🔥

One half of https://pouncelight.games

Ex Embark, SEED, Frostbite, Creative Assembly

🙈http://h3.gd
hehim
Show threadTomasz StachowiakApr 28, 2023
Tomasz StachowiakApr 28, 2023

I wrote a little HLSL ray marcher while experimenting with contact shadows and lighting "reference mode" for Tiny Glade.

Here's the code if anyone's interested: https://gist.github.com/h3r2tic/9c8356bdaefbe80b1a22ae0aaee192db

Depth buffer raymarching for contact shadows, SSGI, SSR, etc.

Depth buffer raymarching for contact shadows, SSGI, SSR, etc. - raymarch.hlsl

Gist
Show threadTomasz StachowiakFeb 28, 2023
Finally, the most striking effect is at dusk. The bricks and rocks recover their hues, and the sickly orange overcast is gone. The sheep looks much healthier too.
Show threadTomasz StachowiakFeb 28, 2023
The difference at night is subtle, and mostly visible in the sky, which once again loses its inexplicable cyan shift.
Show threadTomasz StachowiakFeb 28, 2023
Day time gets a softer presentation, with somewhat suppressed highlights, and a more natural color for the bricks, without the strange greenish overcast. The cyan shifts near the horizon disappear as well.
Tomasz StachowiakFeb 28, 2023

Finally ported 🏰🌱 Tiny Glade to my 🌈🙈 Tony McMapface display transform (https://github.com/h3r2tic/tony-mc-mapface/).

The old transform was something I had developed years ago, and incorrectly considered "neutral". Here's a quick before & after comparison 🧵!

GitHub - h3r2tic/tony-mc-mapface: A cool-headed display transform

A cool-headed display transform. Contribute to h3r2tic/tony-mc-mapface development by creating an account on GitHub.

GitHub
Tomasz StachowiakFeb 19, 2023

I've added a basic OCIO config to TonyMcMapface, so you can enjoy it in various content creation apps 😛

https://github.com/h3r2tic/tony-mc-mapface

(I have no idea what I'm doing so I hope the config is okay 😅)

GitHub - h3r2tic/tony-mc-mapface: A cool-headed display transform

A cool-headed display transform. Contribute to h3r2tic/tony-mc-mapface development by creating an account on GitHub.

GitHub
Tomasz StachowiakFeb 17, 2023

Introducing 🌈🙈 Tony McMapface 🌈🙈: a cool-headed display transform ("tone mapper")

Tony maps HDR Rec.709 to LDR in a (subjectively) natural way, without messing too much with contrast or look.

Comes as a LUT + HLSL for sampling it.

https://github.com/h3r2tic/tony-mc-mapface

GitHub - h3r2tic/tony-mc-mapface: A cool-headed display transform

A cool-headed display transform. Contribute to h3r2tic/tony-mc-mapface development by creating an account on GitHub.

GitHub
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Tomasz StachowiakFeb 17, 2023

Introducing 🌈🙈 Tony McMapface 🌈🙈: a cool-headed display transform ("tone mapper")

Tony maps HDR Rec.709 to LDR in a (subjectively) natural way, without messing too much with contrast or look.

Comes as a LUT + HLSL for sampling it.

https://github.com/h3r2tic/tony-mc-mapface

Show threadBjörn OttossonFeb 17, 2023

@h3r2tic Interesting! Looking forward to hearing about the details of your approach. I've played around with some of the same ideas here:

https://community.acescentral.com/t/some-reflections-and-experiments/4237

https://www.shadertoy.com/view/fsXcz4

https://www.shadertoy.com/view/7dsczS

I've only focused on dealing with the color aspect though. Contrast is just based on the ACES curve (which probably has a bit too much contrast for many applications).

Some reflections and experiments

Hi everyone! I was chatting a bit with Chris Brejon, and he thought it would be useful if I shared some reflections and experiments I have done here. For those who don’t know me, my background is in video games and I guess my biggest claim to fame is having made Oklab, which I have seen pop up a few times in discussion here. I have never really worked with any part of ACES except for the output transforms, so my knowledge is a bit lacking regarding how it fits into the bigger picture. This sur...

Community - ACESCentral
Show threadTomasz StachowiakFeb 17, 2023
@bjornornorn Aha! Interesting too :D Thanks for sharing <3 I'll have to take it for a spin too!
Show threadFroyokFeb 17, 2023
@h3r2tic Very cool ! I'm going to play around with this. 😍
Looking forward to the generation code as well !
Show thread❤️×1Feb 17, 2023
@h3r2tic UK government just announced that your naming sense was wrong, and your tone mapper would be renamed Sir James Fawcett :/
Show threadTomasz StachowiakFeb 17, 2023
@LastLife can we at least do Sir James McFawcettface?
Show threadMatthijs De SmedtFeb 17, 2023
@h3r2tic My visual system agrees this is looking good! I'm curious to see this in a game engine compared to one of the "punchy" filmic curves.
Show threadTomasz StachowiakFeb 17, 2023
@anji Thanks :D I think compared to "filmic" curves, this will reveal a whole new world of _mid tones_ 😅
Show threadDaniel BorgesFeb 17, 2023
@h3r2tic The name is amazing
Show threadTomasz StachowiakFeb 17, 2023
@msk 😁🙇‍♂️
Show threadRune Skovbo JohansenFeb 19, 2023
@h3r2tic I don't understand what's going on in the blue bar image. I can't see the shadows as shadows, it looks like a bright blue wall that's painted white (or light gray) where the shadows would be? When I open the original exr it looks the same, except when I turn off display transform entirely, in which case the shadows are much darker than the light. However, even there the shaded areas have higher red and green values than the lit areas. Bad photo?
Show threadJeremy OngFeb 19, 2023
@runevision @h3r2tic Looks like some severe chroma clipping
Show threadTomasz StachowiakFeb 19, 2023
@runevision possibly poorly transformed from a wider color space
Show threadTomasz StachowiakFeb 19, 2023
@runevision nvm, it _is_ wide gamut, and I'm just stupidly clipping it
Show threadTomasz StachowiakFeb 19, 2023
@runevision correction, there's no good way to clip/map it. the image is deeply cursed and has luminance < 0
Show threadRune Skovbo JohansenFeb 19, 2023
@h3r2tic yeah it looked weird when I opened the exr. Was there a particular reason behind the choice of example images used? Is it some kind of standard set?
Show threadTomasz StachowiakFeb 19, 2023
@runevision they're pretty popular among people messing around with display transforms. Do you have any other suggestions? 👀
Show threadRune Skovbo JohansenFeb 19, 2023
@h3r2tic Not at all, I know nothing about this area, I was just curious, especially as it seems a little odd that a cursed image that tends to produce white shadows would be a popular test case. On the other hand, maybe many cameras produce flawed results like this under extreme colored light, so that it’s useful to see how a given transform handles it.
Show threadTomasz StachowiakFeb 19, 2023
@runevision Yeah, not sure either :P maybe it's an stress test for gamut mapping algorithms. Don't know how useful though xD