What's the relation and difference between early-z, pre-z, z-pre?all of them have hardware one and software one?what the relation and difference between them?

[gpu22]

@Alfonse_Reinheart

z-pre

Depth prepass causes z-fighting.

Cannot get depth prepass to work as calculated depth values occasionally differ. Depth test fails in draw pass sporadically (sometimes for some view angles all depth values pass equality check in draw pass, sometimes nearly half will fail). changing depth near and far from 0.1-1000.0 to 0.5-100.0 makes no perceivable difference in amount of z fighting (besides visibly cutting off some of the scene). depth buffer format: float32 validation layer has nothing to complain about (LunarG from Vulkan…

https://www.gamedev.net/forums/topic/316415-z-pre-pass/

Documentation – Arm Developer

https://www.gamedev.net/forums/topic/316415-z-pre-pass/
https://www.reddit.com/r/vulkan/comments/1b2veku/forward_pixel_kill_vs_z_prepass/