Step 20: Use the line on the far right side as a guide to draw the hind leg that's on this side of the body. Follow the basic path of the guide and lightly sketch the shape of the leg around it. When you get the shape of the leg right, darken the lines. The top of the leg starts high inside the body. The top should also be pretty wide. Add the dinosaur's visible toes and hoof-like nails at the bottom. The bottom of the leg should be thinner than the top. Curve the lines to emphasize the muscle structure. Add wrinkles at the joints.
Step 21: Use the last line under the dinosaur's body as a guide to draw the other hind leg the same way. Draw the shape of the leg around the guide and add the hoof-like nails at the bottom. The top of the leg will be hidden by the body, so only draw the lower, visible portion.
Step 22: Use the remaining lines as guides to draw the rest of the Styracosaurus dinosaur's body. Simply darken the outer edges of the initial guide lines to create the shape of the body. Don't overlap the legs that are on this side of the body. Make the tail a bit wavier to make it less rigid and more organic.
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 Styracosaurus dinosaur drawing to give it 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. Add the value lightly at first, then gradually build up to the level of darkness that you want.
Add even more value throughout your Styracosaurus drawing for extra detail. No one is exactly sure what Styracosaurus looked like (some dinosaurs even had feathers!), so you can shade your drawing however you'd like. You can even color it! For a rough, scaly texture like this, draw random tiny, squiggly lines throughout the body. This process may seem more intricate than it actually is. Don't overthink it. Just add random squiggly lines all over the dinosaur's body. For even simpler shading, just add a medium value to the entire body. If you want to add stripes, draw triangle-like shapes using a darker value all over the body. Shading can be time-consuming, so be patient and take breaks.
Add a cast shadow underneath. This helps ground the dinosaur so it doesn't appear to be floating. Don't forget to pause the video after each step to draw at your own pace.