What is SkyGfx?
SkyGfx is a graphical mod which reimplements PS2 rendering or atleast tries to.
This one is an unofficial version that tries to bring back an atmosphere of PS2 and also to bring back missing effects.
Effects: Water fog, Screen fog, Volumetric clouds, Moving fog (a little clouds in front of you), Grain
Fixes: Fixed greenish textures, disabled ped spec (they dont shine anymore), procobj.dat is working (plants.dat is still in work)
Other: A tweaked pipeline with "dual pass", colorfilter, PS2 car reflections, Exponential fog (still working on)
See the difference below
There is also a great comparison of a dualpass!