Hi, until now everybody thought there was some secret values inside PS2 ELF file. I hadn't believed that and tried something with RGB2 value exists in timecyc.
I had taken the default ENB palette texture and colored it with just RGB2 in photoshop, than enabled palette texture and result:
(Note that ENB disables GTA SA PC default post-processing, so there is only palette texture applied) So, PS2 processes RGB2 differently. Although sky just became overexposed, I'm aware.
That was at 6 AM. I had taken 7 PM RGB2 and tried it in 7 PM, result:
Nearly same, except sky.
(Some pictures taken from Vadim M. PS2-PC comparison)
I post that to here because I couldn't solve the palette texture's logic and couldn't make it codable.
So, we must,
1- Found the way of color correcting sky
2- Find out how we can code palette texture's algorithm within DK's shader api
3- Automatize it with values exists in timecyc