Many game developers don't use any of these engines, and even when using an engine, the underlying graphics API can certainly matter. There's nothing saying tha

Many game developers don't use any of these engines, and even when using an engine, the underlying graphics API can certainly matter. There's nothing saying that Unreal for example, has to support all the same rendering features in Vk and Dx and Metal. And even the same feature can look subtly different between different interfaces.