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by whstl 1 hour ago
My first pro job in gaming was in porting. In my experience, while it does require knowledge in OS and rendering APIs, the platform/RHI-specific code is quite small compared to most other subsystems of a moderately-sized game.

Unless there is absolutely no abstraction, e.g.: with OpenGL being called from random parts of the game, porting is a matter of mostly gluing two interfaces together.