Hey Jersey, great job on these. You're definitely getting the idea of what you're supposed to be doing. The proportions are correct, and they do like they're 3d objects. What I think you're running into is a dexterity problem. Your lines get the idea of what you're trying to do, but to me they feel unpracticed. What I would say is spend some time just drawing circles, and laying down value on paper without any subject matter involved. Listen to a podcast and just let the shapes and tone come out of your arm. I can tell you understand core shadow, mid tones, and highlights objectively. But it doesn't feel intuitive yet. I host a podcast, and recently I had my friend @Lucas Kremer on. He did a lot of work on the Watts online, and he also trained at the Watts for years. I really admire his perspective and his art. In the episode he talks about his peaks and valleys while training, and how the super mundane exercises end up being very important. https://www.youtube.com/watch?v=8pH8d4IRJj8 While I was at the Watts Atelier, all of the teachers had pages in their pads that were just circles, lines, and tone. They would also credit that as one of the most important exercises you can do. @Erik Gist and Ben young would challenge students to spend a long time just trying to make a pile of boxes, or spheres look "cool". Hope this helps!

Hey, I think keeping up the consistency in value will bring it up a step. Like on the prism you can see the value goes lower on the edges of the shadow face and there are splotches of lower value towards the middle. Also the rim light should never be as bright as your highlights! Your brightest shadows shouldn't be the same or lower in value compared to any of your lights. You need a fine light between your lights and darks. Also I have a little screenshot from one of the proko videos to show you what that looks like Keep it up and you will have it down in no time :)