>>5872860First, you have to understand that if you can't copy this finely with graphite, there are little chances that you can do so with oil. So, you first need to understand how to finely render form monochromatically on the flat; copying Bargue plates in a good way to learn about this.
Then, when it comes to doing this with oil, you basically have three approaches: 1. you start with a fine, detailed drawing. Then, you just have to slowly go over the drawing with oils, rendering the thing bit by bit:
https://www.youtube.com/watch?v=sSkeA5vAr40As a variant of this method, you can make a monochrome, and then layer with glazes and scumbles to progressively match the model.
2. you rely on a looser approach, start with a more approximate drawing, and progressively refine the proportions, working layer by layer. First layer is a crude drawing, second layer is a general light/shadow separation, with a touch of edge work in between light & shadows, further layers are rendering & color adjustments. This is basically what people like Cesar Santos would do:
https://www.youtube.com/watch?v=bFWQlDAWVrc3. You basically do the same as the previous, but all in one session: you usually sacrifice accuracy for speed, and get a more broad result:
https://www.youtube.com/watch?v=hDNinFaPA301 or 2 would be better to copy your picerl, but 3 is still a very instructive method. 2 is the modern atelier approach basically; 1 is more old school. I would recommend using 2 if you're beginning, but don't hesitate to try the others; 2 is perhaps the "easiest" approach. The key, as always, is to practice this 10, 20, 30 times, until it becomes second nature. That's the hard part.
