Digital sketch || White on black

I really really love this way of sketching. When i was little i used to dream about having black paper and writing on it with white pen, that thing wasn't just rare, it was impossible for us to do back then.
Now everything is so simple. I took a black colored canvas and started sketching in it with white.

I used a image of henry cavill in the witcher outfit to draw this face. No, it does not match his face. It takes too long to do that. I don't always want to make a proper copy of someone. Let it be what it became.

Here are some process shots:

Reference image for this drawing.