Black and white lily drawing, any feedback would be helpful
Hello, this drawing took probably around 25 hours give or take. I have a photo of the drawing, and a photo of the reference I used. I used a 1 inch by 1 inch grid on it. I feel like parts of it aren't shaded dark enough, but I really feel like if try to do more now I could end up messing up the whole drawing by overworking it.
Also I want to use charcoal for the background. I want the background to be pitch black which charcoal can do, but I'm scared that the charcoal could smudge on to the graphite and ruin the drawing. Anyways, let me know what you guys think, any feedback will help, thanks.