I don’t believe in pure photographic drawing where every mark is perfect. That’s imitation and imitation is not art, it’s craft!!
One must portray their art in their own words, ie. their own particular style.
Art is rarely supposed to be seen up close, with the exception of miniatures.
You will see by the areas I have included that all is not smooth and even. When completed this drawing will have imperfections, and so it should. If I can convince you that when finished this drawing is of rocks, then I’ve done my job. After all, art is an illusion.