Hi hi! Badass posing of a Zoro! Very much like it! You were on a good path with building blocks, it just needed some tweaks regarding shape,volume and proportion. Here, we can remain blocky since, in contrast to female figures, which we prefer to be more delicate and complex in terms of design, masculine figures typically have sharper angles and lines. Personally, I prefer painting male characters than feminine ones, yet I still occasionally struggle with drawing back views. Although organic shapes can be challenging, there is a lot that cannot be taught. Here, I recreated your drawing using only basic construction blocks with geometric shapes like squares, cylinders, spheres, and triangles. Returning to the mannequin makes it much easier to rework artwork and helps us self-correct where we went wrong. The best way to convey volume is with a 3/4 perspective of the back rather than a full front view. As usual, use references to support yourself when adding muscles. To make things clear and easy to understand, use muscle grouping. Only the general forms of the muscles are sufficient; we do not need to display every single fiber on the body. Hope it helps! Happy learning! | Artwod Feedback