Depth Based Approx FOG in 1.17+

[ruby umbra]

give us the option for depth based approx fog in 1.17+ 😭

In 1.17+, they changed fog to use shader distance for fog, instead of depth based approximation.

I can send some photo examples if needed

(Old Fog (<=1.16.5) is a depth based approximation. Modern Fog (1.17+) is through shaders and uses the actual distance.)

[ruby umbra]

left is 1.17+, right is 1.16 and below

(it affects more than visually btw)

[ruby umbra]

(also to any devs, if this is a simple code change, can you please share as I would like to know)