Picking fruit, especially of quick ripening plants such as berries I have noticed that as a fruit is removed a relaxation happens within the plant, other berries across the plant light up,. Its subtle, and immediate, almost like a chemical sugar hormone surface defined and attracted to the nodes..
My visual map looks a bit like this bird net that been stretched by the tree growth.
When a fruit is ripe it fluoresces a bit.
Once you train you eye to see this ripe fruit stand out like lantern.