Clarifying Folding Technique of Green Diamonds Wrap

In photos. 

The main folds are along the red dashed lines and the black lines are secondary folds created after the initial folds.  However, the whole thing was worked left to right so only a couple of the sections were being worked on at any one time.  The dashed lines represent mountain folds and the dotted represent valley folds (as in origami). 

folding diagram

first set of primary folds

filling in some secondary folds

pinching up some secondary folds

setting up next segment of primary folds

pinching up more secondaries

it stayed better with wet fabric than this dry run

working along to create the concentric secondary folds in a V shape

another segment done

from more directly above, more scrunched up

ridges marked out