Yes, it is a very basic concept, and I have also seen how even after a long career drawing they still use it, I think that as long as they feel comfortable drawing. I apply it many times
si es un concepto muy basico, y tambien e visto como aun despues de una larga carrera dibujando aun lo usan, yo pienso que mientras se sientan comodos dibujando. yo lo aplico muchas veces