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Very respectable of id to release it. I bet the could still get some sold cash from it if they kept it closed.

I get the point you are making and to a certain degree, I agree with you.

Havign said that, they still do get cash from the engine, through existing licensing deals.

I haven't checked this specific license that doom3 was released under, but it's common for the code to be released under a free license for non commercial use, but a paid license would be required for commercial variants.

The engine (idTech4) is released under GPL. Thus, you can use it for commercial use without paying anything. I guess you can also still buy a non-GPLed version.

Derivative work that uses the engine must be GPL'd too. That is bad for commercial products that intend to be closed source; I guess those are the commercial products that buy the engine.

But that doesn't apply to the maps, sounds, and textures which are really the heart of the game.

They dont open source the latest version. Tech 5 already came out.

>They dont open source the latest version.

I never said they did?!?

Doesn't matter though. Even the version before the current is still pretty new tech & interesting to study.

nevertheless

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