I approach every part I'm asked to do and decide to do from exactly the same angle: who is this person, what does he want, how does he attempt to get it, and what happens to him when he doesn't get it, or if he does?
I regard texture similar to the function of taste buds in our mouths. But in a visual form. Texture does create a specific flavour which affects our senses.
If a writer stops observing he is finished. But he does not have to observe consciously nor think how it will be useful. Perhaps that would be true at the beginning. But later everything he sees goes into the great reserve of things he knows or has seen.
A tale from which pieces have been raked out is like a fire that has been poked. One does not know the operation has been performed, but everyone feels the effect.