Step 20: 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 drawing for extra detail. Paraceratherium is related to modern-day rhinos. Its skin may have been gray too, so use a medium value all over the body. No one is exactly sure what the Paraceratherium looked like, so you can shade yours differently if you'd like. You can add stripes, spots or even color to your drawing! For a simpler version like this, just use a medium value. For a more detailed guide on how to shade, check out this tutorial: How to shade.
Add more shading to give your figure more dimension and volume. Use a darker value for the shadows. Vary the pressure on your pencil to get different degrees of tonal value. Pick the direction of the light source when shading so that the shadows are consistent with it. Add the value lightly at first. Gradually make it darker until you're happy with the result. Don't worry about shading too smoothly. The rough value will give the Paraceratherium's skin a bumpy texture. Continue adding shadows to the entire body. Don't forget to pause the video to draw at your own pace.
Add a cast shadow underneath to ground the Paraceratherium so it doesn't appear to be floating.