Very nice work! Overall you've definitely done an excellent job with your work throughout this lesson, and as a whole you've demonstrated a very solid grasp of how you can build up your constructions by combining simple forms, and how those forms relate to one another in 3D space. There are a few things I want to draw your attention to, just to keep you on the right track, but I am very pleased with your results.

The first thing that jumped out to me is a relatively minor issue - just don't forget to draw through all the ellipses within this course. You're clearly capable of drawing fairly smooth and even ellipses in one go, but there are definitely cases - some contour ellipses for example - where they've gotten a little uneven. In general, it's best to just keep drawing through them for anything you do within this course just to ensure that you continue getting that additional muscle memory.

Moving forward, as a whole I'm really quite pleased with how you're handling your additional masses in most cases, but I do want you to remain aware of one thing - where you choose to place the complexity in the silhouette of those additional masses matters a great deal.

The easiest way to think about the additional masses is how it exists on its own, as a ball of meat floating in the void. There it is at its simplest, consisting only of outward curves. Once you press it into an existing structure, however, the side that makes contact takes on greater complexity to wrap around and grip that structure, and whatever other forms it may consist of. This results in that side of the silhouette developing more inward curves and corners, but it'll still maintain simpler outward curves along the sides that aren't making contact. You can see this in practice in these notes.

So, as shown on your cats, here, don't let the outer side of those additional masses develop inward curves. Keep them simple. Also, look for opportunities where you can get those additional masses to wrap around other parts of the body - the big driving masses at the shoulder and hip are especially nice for this purpose.

Another area where you were doing reasonably well, but could have done better, is with face construction - specifically in treating it as a puzzle with a lot of clearly defined pieces that fit snugly together. As Drawabox is constantly evolving, I frequently come up with better ways to explain certain parts of the material, but don't have the chance to incorporate it into the material - that's something I'm working towards (with a full, gradual revision from Lesson 1 onwards). That said, I build it into my critiques, and also try and include it in the informal demos sections. You'll find there a detailed breakdown on how to think about head construction - specifically in how the eye sockets serve as the first major opportunity to break the rounded surface of the cranial ball into a series of more refined planes, and extending that into the rest of the head. You are working in that direction, but you tend to rely a lot more on more curving lines, rather than firm, straight cuts.

I've got no complaints about the legs - you're applying the sausage structures quite well, and combining them with additional masses to continue building up bulk where it's needed. The only other thing I want to talk about is, briefly, how you ended up going a bit crazy on the contour lines with your rhinos. Really, don't turn your drawings into wireframes. Contour lines themselves are something you should use sparingly. Focus on employing them where different forms intersect, to define their relationships with one another, and when you do place them such that they run only on the surface of a single form, make sure you're doing so for a good reason.

Oh, actually, I do have one more point to offer. I don't usually comment on the hybrids, but I noticed how you approached the construction of the wings there. While construction is indeed all about building up from simple forms to complex ones, that doesn't necessarily mean considering the structure that exists inside the given bodypart. With wings, it's often better to just build in big visible masses, and then add feathers on top, as shown here and here.

Alrighty! I'll go ahead and mark this lesson as complete. Keep up the great work.