Mountain Moss - Tutorial

The past few days I've been focused on moss. I found the tutorial for this version on YouTube (https://www.youtube.com/watch?v=eK_jA-pIfeI), and gave it a try, though I'd really been looking for the kind that grows on rocks. I still need to come up with a moss to add to my granite, so this is just the first moss I'll do. The references I found for this kind of moss make more irregular tufts than what resulted from the tutorial, but I was not able to make out the details of the reference shown in the video. I think I'd need a different starting shape to match my reference, but I really liked the effect from the video, so I stuck with it.