[REL] Dark Waters

May i ask you, what you know about files that touch water and sky (let's say environment)? I know that creators of environments in sh5 change platforme.dat and materials.dat, but in sh4 materials.dat, particles.dat and cameras.dat, I have the same files in env folder and scene.dat in 2 my installations, but effect is different. So i take look at library folder. There are shaders of course, but i have same in my environment and i'm 99% sure other not different so. Textures can't change lightning (it's changes) and color of water. Yesterday (my morning), i got the best effect - color of water depended by sunlight - where sun - there are color, where not there are greyish water. But for some reason i deleted this install and now don't remember - interior was lighted well, as good, but exterior too dark. So i ask any help to understand this, becouse i close i think.