Look into any creek. The water is clear and you see the bed: stones in many sizes and real scanned shapes, rounded, angular and flat, packed tighter in fast water and sparser in pools. Under the water they are wet and a warm tan-brown, darker where it is deeper, and the stones above the waterline stay dry and pale. Before, a creek was flat gray water over gray mud.
Where the sun reaches the bed, a moving net of light plays over the stones, the pattern that ripples focus onto a real creek bottom, and it stops in the shade of the bank. The cobbles stand up a little from the bed, the shallow edges are pale sand and pebbles, and the bank just above the water carries a darker wet band.
The big white boulders standing in the stream have not been changed to match yet.
