Really nice!!

Oh wow! These look great! Awesome job.

since you draw digitally, you can lower the opacity of your drawings and lay them on top of the reference photo. Being able to check the proportions easily is one of the biggest advantages of digital drawing so make sure you use it

Hey, @Mike Karcz! The way you’re imagining the box enveloping the pelvis looks pretty effective to me. To make it even simpler, I’d suggest thinking of a basic box instead of a tapering one. In How to Draw Structure in the Body – Robo Bean, Stan mentions which anatomical landmarks to consider when drawing a box to represent the pelvis - although, yeah, the volume of the simple box should also include some muscles, since the pelvis bones for themselves won’t fit perfectly inside it. In that sense, the 3D Model: The Bucket is definitely a more accurate tool for an advanced construction of a believable bone structure for the pelvis, as @Gabriel Palma very properly mentioned. But, in a general sense, we can still use the idea of a simple box to visualize and more easily draw the pelvis or pretty much any 3D object - the key is to let go of a perfect fit and just think in terms of where are the main planes of that object (front, back, sides, top and bottom). As an example, I’m attaching a quick diagram of how I visualize simple boxes in this Skelly pose. Notice it’s not precise, so there’s some room for variety and interpretation, as long as the general plane changes make sense. Using this approach (the “box logic”, as @Steve Huston usually says) can be helpful to keep us grounded in a 3D thinking mode in the simplest way possible. If we train ourselves to solve basic boxes, it can be easier to carve out of it any other more complex forms (such as a pelvis) later on as we develop a drawing. Hope this helps. Keep up the good work!