Good job, I think it looks great ! A little issue on the long fish when the cross contour line direction change. I had the same difficulty in my attempts. I guess the curve need to go slowly flatter until it is almost straight and then go back to a curve the other way. I try to think about it like 4 point perspective. Hopefully it helps :)

You really knocked the coconut crab out of the park! Great job!

The pose really doesn't come across as static to me at all -- and that colouring is gorgeous! Absolutely gorgeous!

I'll try to put into words what I see, but I often struggle to explain what I mean in a foreign language, so please bear with me if my thoughts on your work seem tedious or messy. In general, you seem to have a rough grasp on how perspective should work, However when putting the boxes over a photo or a head, you seem to struggle between following the rules of perspective and what you see in the photo. Also you are using parts of the face as reference for where your lines should go, that would protrude past the box, like the tip of the nose. What do I mean by that? If the eyebrows represent a part of your box and the forehead represents a part of your box, then the ROOT of the nose or the chin would be on the same plane for the front face of that box. The TIP of the nose however is not on the same plane as the eyebrows, forehead and chin. In your picture number two you start the line in the center of the front face at the forehead, but then you go through the tip of the nose and therefor miss the tip of the chin. You can try that in real life. If you put your pencil on your face in a way that the tip touches your forehead and the other end touches the tip of the nose, you will see that you are holding that you are holding your pencil at an angle that does not follow an imaginary box around your head but rather points in a "diagonal" direction compared to that imaginary box. (I attached an image in a profile view of a head to illustrate what i mean. The blue lines show how a box would roughly wrap around a head and the red line shows how a line going through the tip of the nose deviates from that.) The other thing that sticks out to me is that once you established a correct line, the other lines that should follow the rules of two or three point perspective ignore the foundation you put down. Again in picture two, the line going from the top right of his fore head (top left from our perspective) to ho the bottom right seems correct to me. That we can see the top of the box indicates, that the person is looking down a bit (which he does), but then the line from the center of the forehead through the nose leans AWAY from the first line. The rules of perspective would dictate, that these lines should converge towards the bottom somewhere. Yours spread apart. Again that is probably because you drew the center line through the tip of the nose and the next line was oriented towards that already wrong center line. So rather than sticking to what you know about perspective, you let what you see in the image deceive you and broke the rules of perspective to follow that second line you put down. Another smaller thing is, that most boxes seem to ignore the upper portion of the head. In image 18 we clearly see how the box does not include the rounding of the top of the head. Also the Box is skewed because you stick more to how you interpret the image. Try to use some easy to find refrence points (line trhough the eyebrows, line from the middle of the forehead through the middle of the chin, line from the top of the ears to the eyebrows) and then try to use what you know about perspective to construct the box around the ehad, rather than letting what you see in the image confuse you. This basically keeps on going. In image 19 you correctly drew a line form the top of the ear to the eyebrow. it is angled slightly upwards, therefor indicating that the man is looking slightly up. However the line above that is angled down. This likely happened, because it is very hard to tell what a box around a rounded surface would look like or what direction it should go. The top of our head is pretty spherical so it is hard to find a box around it that matches the rest of the face. That is why you should rely on the points that are easy to tell (in this case top of the ear to the eyebrow) and then use what you know about perspective to understand how the line above should be angled. In this case the line from the ear to the eyebrows is angled upwards. The line above is angled downwards. So much in fact that the top plane suggests the box was angled downwards rather than upwards. So bottom line: Try to find lines that are easy where you can tell for sure, in what direction a line would have to go. Then construct the other lines with what you know about converging lines in perspective rather than letting the rest of the image distract you.

Great work Julien! I probably did this myself more than once. But I think for this exercise it is best to have one axis that is parallel. Thus two-point. And it looks like you miss that in a few cases. Creating a weird vanishing point that doesn't make sense.

You're on the right track. One thing I would say is be sure to make the box containing the head more accurate. It doesn't have to be perfect to help guide your drawing, but pay special attention to converging lines. For instance, in the second to last photo, because her head is tilted back in space in this view, the lines going up from the jaw to the temple on the front plane of the face should be converging. It looks like you're tapering the lines to the chin since the jaw tapers, but any form movement within the box is separate from the box itself. It's really easy to get this wrong. And to be fair, you are attempting 3 point perspective and we haven't covered that yet. That said, the habits you're developing in laying in your boxes (and later cylinders) will affect your art for the rest of your drawing life. Every realistic drawing will be governed by your form thinking. Improvements here will ripple through every picture you ever make.

Good idea. I also feel the same. I draw on paper first, and I feel all my drawings look off. I will also try tracing them on iPad today. After I finished the tracings, I will post them too.