Stream in Late Afternoon

This is the companion painting to yesterday's early morning stream, except this is from late in the afternoon.  The same stream with the sun coming from  nearly the opposite direction.  For variety's sake, I opted to have stream at the lower left instead of the lower right, and put the existing sand and stones at each lower corner.  Both are studio paintings, which took me most of the day to complete, which is probably why they don't look as flat and simple as the plein air pieces.   How to do something in one hour that would normally take several hours?  Hmm....