My last 'Long Drapery Study' was much less clear than this after 4 hours (2 hour session * 2 days); This is the next instance, after a single 2hour session.
When I began thinking of it as a wireframe study it became much easier.
This one is supposed to be studied for 2 hours over 3 sessions; I'm not sure if there will even be anything left to nail down after the second session.
the interpretation of 'base'. It doesn't seem entirely clear whether this is supposed to mean 'water level' (absolute low Z depth) or 'the level that is the base of the protrusion of this particular fold' (relative low Z depth)