Hey Uzlek There's some nice stuff here. Let's go through parts. My opinion is that you're trying to shade too early. You haven't solve all the problems with perspective and proportion yet and you're jumping into shading and adding details. And even the shading has problems. You're letting your halftones too close in value of your shadow and the result is confusing sometimes. So let's fix it piece by piece. First, when starting your drawing you need to establish the main proportions. This skull is modeled after the Loomis head, so study it's proportions. Also ask yourself the questions How big is the width compared to the height. How big are the eye sockets, how big is the mouth, etc. Measure everything and Mark it on your head. Secord establish the perspective. You need straights. Simplify everything into simple forms the cheek bones are boxy, the muzzle is a tuna can, nose is a box etc. Later you can refine the forms and add more curves but initially you need to fit this forms into space. Finally after you refine the forms you shade. Start separating the light from the dark. Fill your shadows with a value 5 (for a value 5 you need a few passes of your pencil. It can't be something that you achieve with one layer. That's reserved for the halftone.) them split everything into 5 values. From there is done. You can refine edges it indefinitely but for a study here's a good place to stop. Another tip. Don't draw teeth individually. You'd think that it adds to realism but actually it destroys the illusion. Group their shape and use a few fine lines to separate the teeth. Never thick lines. Keep Drawing and best regards

Hey Daniel. I Think the problem is how you're organizing your values. Remember when a plane change it change its value. So imagine the skull as a box. If you light it from the top it's top gonna have value 1 one side value 2 and the other let's suppose it's in shadow is value 5. If we carve the sockets in it you're gonna create a convex form or a hole to be more simple. Top of this hole gonna be in shadow so value close to 5. However it's bottom is gonna receive light almost the same way of the top of the box since the planes are almost parallel. So value 1. So a quick fix would lighten the top a little and the bottom of the eye socket (I can guarantee it because with rendering you fix something and suddenly you have to adjust the rest) . But to really get better you need to study value structure and proportion. Right now I think you're starting to see value and planes but everything still too timid, it's too middle tone. You need to work with darker and lighter values together. This site have a tool where you can simplify photos into 3 or more tones (5 is ideal for studying) Use it. Do this exercise of simplifying into 5 tones often. It's the faster one I know to get better at rendering. For proportions study closely the proportions of the head and when drawing use comparative measuring. This part is really boring but if you do it enough you start to estimate the sizes more accurately without measuring. Hope this helps Keep drawing and best regards

Although I know it’s a phase, it’s very frustrating. My solution recently was go to Bridgman bootcamp, watch, put your mind to zero, follow the instructions and draw draw draw. It’s part of the journey, but I also forget this sometimes. What we need then is a thumb up, so here it is: 👍 :-)

Definitely a challenge, but you got some great results! The Loomis model comes especially in handy when breaking down such a complex form, as it helps to think about it in its most simple view, that being a sphere with the plane of the face. It can help to visualize these simple forms as you approach the skull from different angles, taking note of how the change in viewpoint would change the curvature visible on the form, and subsequently the placement of the features as they wrap around.

Nice studies, you're going after some challenging angles too, which is great to see! You really captured the wrapping of the teeth in the down shot of the skull in #4! You can push the wrapping gesture of the teeth a bit further in the up shot #3, they're feeling a little flattened out. There's a bit of an S-curve to the teeth at this angle which can really help sell the teeth wrapping around that bloated tuna can Stan talks about in How to Draw Lips – Anatomy and Structure. Keep up the good work!

This is great practice! Nice work!

Great job! It does look like you took your time. The definition is awesome, especially on the teeth.

Your effort really shows! I am practicing the simple head most of all since it is a lot faster to finish. I hope you learned a lot!

Awesome work .. great value control . Good lights and shadows

You probably can't download the 3-d model, but you can download several photos from many angles of it. They are together with the photos of the loomis head: https://www.proko.com/course-lesson/3d-model-the-loomis-head/downloads