I like the way this work has a feel of classical art. The choice of the Lute fits perfectly into that theme.
To me the key to this piece is the fact the horse to human transformation being hidden behind the instrument. I am assuming that was on purpose. The fact that you are painting a centaur in not immediately obvious and it adds to the impact when the viewer realizes what is being presented. That turns what would be a mundane scene into something that catches the eye.
If I was to make any improvement I would have placed the fingers on her right had to actually be in a strumming position.
*takes a breath* ok. here goes on my critique, which this isnt much of one, more like praise on such amazing work.
First off, I love the color work... truly a realistic and wonderful job. The way the coat shines on her horse end, its remarkable. Especially in the chest region its almost a glowy effect. Also her facial expression has depth & emotion. The rock too have great detail, we can see every detail, every crack and crevice, quite natural looking
As for anything to critique, I can only say that perhaps the human bit and the horse bit could have been blended together abit more. It looks as if its just cut off right in the middle. I do understand that the instrument hides it, but there could have been some blending below the instrument it would have made just the little bit of difference. Anyways well done. Its a beautiful piece & I'd love to learn more from your works.