In general these sketch are nice start to see the general shape of forms. And how you can improve: 1. Shapes and general study of volume, not only in construction but also in the lines and how these lines can recreate volume and three-dimensional aspect. 2. Improve line-art and consistency on shapes. The left piece, for instance, is less consistent in shape and line-art than the right one. It would be nice to try to find some variation in the line width of the pen. Or even try to use a different width or tool. Felt tips are very demanding in line-art but in the other hand you cannot make many mistakes. Try also to close some line that are open or not too precise. | Artwod Feedback