People worship this guy, but other than being a good C++ graphics programmer, it isn't clear what he's actually done.

Well some people do, I'm sure, but most people just pay ordinary levels of attention to him. And they do that because he's made interesting contributions to multiple products that people like using - which is enough, surely?

(Regarding this specific tweet, this seems to be him visiting his occasional theme of how to write C++ in a way that will help rather than hinder the creation of finishable software products. He's qualified to comment.)

Doom which was countless fun for people up to this day who make mods? (E.g. the great Myhouse.wad that was perhaps FPS of the year... 2023)

Quake, which was a good game, but arguably a better engine that lead to things like Half-Life 1?

Other games?

Shared the code to Doom and Quake?

I guess you dont understand how big of a game Doom was. The first episode holds suprisngly well up to this day, even after hundreds of doom-clones as they used to call FPS games.

But he didn't design the Doom game. He designed its graphics engine.

You understand how games work, do you? Please tell me you do. Else, what kind of argument is it?

The engine enables people with actual creativity to realize their vision. I believe Carmack was part of that creative process, but the condescending tone of your comment really isn't appropriate because in most games the engine is just a means to an end (nobody sane idolizes games because they're using unreal underneath, for example)..

Just decided to talk shit on Friday? What you believe doesn't matter. Facts matter, and your knowledge of facts are far away from truth.

What is your point?

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His engines are open source, and graphics are far from the only interesting thing about them. If you don't know what he's done that's on you; it's no secret.

So again, what has he done successfully besides C++ graphics?

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More than you will ever do mate.

That's not part of my argument.

You don't have any argument at all.