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Unreal Engine to move to using Y-up
(midwest.social)
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Z is depth. Why should it ever be up? Honest question.
Camera space vs world space.
Personally z up is the only one that makes sense.
It depends if you view the X-Y plane as the camera/viewport/screen or the ground. If X-Y is the ground, then Z is either up or down.
Ahh ofc
For cameras, the convention is Z depth but right handed: