Hey there, welcome to the course! You've got a great start! What could help is looking to distribute the values more evenly across, so I think just the small change of lightening up your 2nd darkest value and darkening your middle value a bit could help make things more even across the board. Also, when it comes to filling in the values, try to make sure there aren't white gaps left inside your value groups, as this can make the value unclear or even change it. Especially when it comes to the darker values, having white sections can throw off the illusion of the 3D object. With the lighter values, try having a lighter shape outline (which luckily with the Ipad, you can make the outlines on a different layer, then hide it), as to also continue the 3D illusion without having a harsh line breaking it up. Keep at it, hope to see more of your awesome work! :)