Feature request: Saturn style water

[Richard-L]

https://user-images.githubusercontent.com/4934209/139142220-60e3ee7a-aa53-433c-ac38-6083696d15bb.mp4

Since we talked about it, why not collect it.

In the Saturn version, farther away water is gradually drawn with more saturation of the given water colour, and also seems to look a bit darker. This creates an effect of murky water which is quite nice, and could be an optional visual feature for later.

[Richard-L]

For reference, here's a nice first attempt by Troye in his TR3 project to do something like this:

https://cdn.discordapp.com/attachments/1028717372841934879/1068869220198264892/Tomb_Raider_III_2023-01-28_06-08-34.mp4

[Richard-L]

Curiously the PowerVR version seems to have had a similar effect on the PC - compare the underwater moment in the Lost Valley demo here: https://youtu.be/J20pDT8Y6Yg?t=51