Step 20: Use the last angled line under the body as a guide to draw the other hind leg the same way. Draw the shape of the sphynx's leg around the guide. Make the top part wide and don't forget the toes at the bottom. Add a few lines within the shape for structure. The top part of the leg is behind the body, so don't draw it.
Step 21: Use the remaining lines and shapes as guides to draw the rest of the body. Darken the outer edges of the guide to create the shape of the sphynx's body. Use a single smooth line for the edge. If you use short strokes, you'll get a furry texture. Curve the line at the top along the initial circle for the shoulder blade. As you draw the underside, don't overlap the legs that are on this side of the body. Draw a series of short lines throughout the cat's body for the wrinkles on the loose skin.
Step 22: Darken the curved line on the right for the top edge of the sphynx's tail. Draw another long, curved line under it for the bottom edge. Make the base of the tail thick and gradually make the shape thinner toward the pointy tip.
Step 23: 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 sphynx cat drawing for extra detail. Add shadows by using a medium to dark value all over the body. This gives the figure more dimension and volume. Pick the direction of the light source when shading so that the shadows are consistent with it. Vary the pressure on your pencil to get different degrees of tonal value. Use smooth, even strokes for a hairless look. Avoid rough shading that will appear as a furry texture. For a more detailed guide on how to shade, check out this tutorial: How to shade.
Shade lightly at first, and then gradually build up to the level of darkness that you like. It's a good idea to use reference as you draw for an accurate depiction of a sphynx cat. Shading can be time-consuming, so be patient and take breaks. You can add more value to the skin if you'd like. For this look, just add a light value all over the body. Even though they're mainly hairless, sphynx cats can have patterns on their skin, so you can add spots or patches of darker value on the body. If you have a pet sphynx cat or a similar breed, try to duplicate its skin pattern on your drawing.
Don't forget to pause the video after each step to draw at your own pace. Add a cast shadow underneath. This helps to ground the cat so it doesn't appear to be floating.