Step 15: Add more lines and short strokes throughout the face for wrinkles. Most of the wrinkles are located above and around the eyes, so focus on that area. Simply draw curved lines that are made up of short strokes above and between the eyes. Some pugs have more wrinkles than others, so draw as many or as few as you want. Add some wrinkles under the eyes and on the side of the face as well.
Step 16: For a cleaner look, erase as much as you can of the initial guide lines. Don't worry about erasing all of the guides. It's okay to leave some behind. Re-draw any final sketch lines you may have accidentally erased.
Final Step: Add some shading to your pug drawing for extra detail. Use a dark value for the nose and muzzle. Don't shade in the tongue yet. Push down on your pencil to get a dark value. But don't push down too hard because the graphite gets shiny and you might tear the paper. Use a lighter value for a couple thin sections on the dog's lips to represent shine.
Shade the pug's eyes using a dark value too. Use a slightly lighter value at the bottom of the eyes for a gradient effect. The fur around the eyes should be dark as well. You can also just shade the eyes and nose for a white pug. Use a series of quick, short strokes to shade the wrinkle above the nose. The white of the paper comes through the individual strokes, making the value lighter. This process is very time-consuming, so be patient and take breaks.
Use a dark value to shade the dog's ears too. Use a slightly lighter value for the edges of the ears to represent a bit of shine. Now use quick, short strokes to shade in the rest of the head. The strokes should radiate outward. They should be vertical at the top and bottom, and horizontal on the sides. Let the white of the paper come through the space between the strokes.
If you have a pet pug, try to replicate its coat pattern and wrinkles on your drawing. Don't forget to pause the video to draw at your own pace. Use a light value to shade the tongue.