339
submitted 10 months ago by pookie to c/technology@lemmy.world

cross-posted from: https://lemmy.ca/post/34328210

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[-] ch00f@lemmy.world 143 points 10 months ago

For those who just wanna know: cards at the time performed math on brightness values assuming a linear brightness scale when it should be logarithmic.

[-] wewbull@feddit.uk 110 points 10 months ago

....ish

The maths was right, except it was all being done on colour values than already had the CRTs response curve baked into them. You may have heard of "gamma correction". Well, this is when you correct an images colour values for the display you'll view it on.

Blending before gamma correction and after gamma correction produce very different results. The cards were doing it after. This story is about doing it before.

Paul Debevec had similar observations around the same time. His work at the time was all about HDRI and that was put into Source a few years later.

[-] ch00f@lemmy.world 39 points 10 months ago

Figured someone would do it better than me. Thanks for the correction

[-] Excrubulent@slrpnk.net 12 points 10 months ago

Fastest way to get an answer on the internet.

[-] SkaveRat@discuss.tchncs.de 31 points 10 months ago

When the HL2 documentary came out, someone said "all these gaming news sites will have contant for months" and they were absolutely right

[-] SpaceNoodle@lemmy.world 18 points 10 months ago

I do this to my silicon vendor. I apparently made some people's lives very uncomfortable for a good while this past year after I decompiled some of their binary blobs.

[-] ekZepp@lemmy.world 14 points 10 months ago
[-] latenightnoir@lemmy.world 9 points 10 months ago

That moment when there's one company with which you'd almost be OK if they turned into a monopoly (still no, though).

[-] palordrolap@fedia.io 37 points 10 months ago

Valve is that perfect example of being just shitty enough to be annoying without stepping over the line into complete enshittification. But this too will happen. I reckon there'd be good odds of it happening not long after Gabe retires.

[-] latenightnoir@lemmy.world 8 points 10 months ago

That's my main worry, and why I'd never want a monopoly of any sort with contemporary hierarchical structures.

[-] 5C5C5C@programming.dev 4 points 10 months ago

If they ever go public then yes, enshittification is guaranteed. As long as they remain a privately held company, there's a chance they can hold the enshittification at bay.

[-] DaddleDew@lemmy.world 7 points 10 months ago

That explains why Doom 3's shading looked so bad

[-] jagged_circle@feddit.nl 1 points 10 months ago

Wasn't their shading the whole selling point?

[-] InFerNo@lemmy.ml 1 points 10 months ago

Mhm yes, is this going to fuck up older games?

[-] jagged_circle@feddit.nl 7 points 10 months ago

Everyone's saying RGB is the problem, but what's the alternative? CMYK?

[-] sunbeam60@lemmy.one 7 points 10 months ago

The way I read about it they were merely talking about out gamma correction. Or HDR—>SDR mapping - I wouldn’t say the article is super clear.

[-] Asidonhopo@lemmy.world 1 points 10 months ago* (last edited 10 months ago)

Allow me to introduce you to the perceptually uniform color spaces, CIELAB, CIELUV and HSLuv, something I needed for a project I was working on a few years ago:

https://programmingdesignsystems.com/color/perceptually-uniform-color-spaces/

this post was submitted on 06 Dec 2024
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