short answer- the way you drew the red lines is "correct". I don't understand why you slanted the coned roof- and the longer answer involves understanding the limitations of linear perspective (which- gasp! isn't perfect). can you show the construction lines you used and why you angled the roof?
it's easier to give feedback if we can see your construction lines. if you aren't using construction lines then your contour line work is pretty good. one thing that stands out to me is the way the hamstrings connect to the fibula and it's proximity to the kneecap. when you understand that relationship- you'll be able to make the knees look more dimensional
the drawing is beautiful and fun, but the rendering is interfering with your representation of your anatomy knowledge. For example, how do you see the sartorius working on the viewer left leg? because you've done such a good job rendering it, it's hard to see what you are thinking or "have learned". from what I can see here- 1) the "ledge" above the knee on the viewer left leg as it transitions into the quad is more extreme than what's seen in the photo. 2) the transition from the bicep into the brachioradialis muscles in the viewer right arm looks segmented. Maybe the bicep is popping forward too much with it's lightness and needs to be a tad darker- maybe the brachioradialis muscles need to come a little higher up the arm. 3) the first phalange in the big toe on the viewer left foot needs to be longer (toes are too short) . But all those observations are helping you to copy an image and not really understand anatomy, but i hope you find it helpful.
it's pretty and fun. 1) your clouds are pretty cotton candyish. that's a style thing- so 50/50 on that. 2) going to have to reverse the light on the moon, (or else you are in a system with two suns... but that still doesn't work because the light that is hitting the scene would still be hitting the moon in the background) 3) I'm not seeing enough temperature change in the shadows on the grass in the foreground- and the hills in the background need more atmosphere perspective turning them grey like the sky in the horizon. - did you have any reference for the color palette on this? Without one, this is mostly subjective and it will be hard to get it "right"
similar to what samuel eli said, since you have angles on that rear tibia, there is foreshortening in every orthographic projection- there is no way to improve upon this without using a 3d model. All that being said- it looks great! you should move forward
that reference is a challenging piece to pull anatomy from. They aren't showing bones (or even landmarks like the spine of the scapula or the PSIS) and they are grouping some of the muscles together. Frankly, I'm impressed by your effort of getting the simplified skeleton in there (seriously! that's a challenge). It's difficult to critique this because I don't know where you are on your anatomy journey but my impression is that you need to find references that show both the bones and the muscles and focus on smaller muscle groups before attacking the whole back.
these gestures look really solid. You are at a point now where you need to do more of the longer drawings and see how your gestures helped/hindered your construction process- once you have that information, you will be able to go back "improve" how you do your gestures for the sake of using them as construction lines for yourself. (for example- you haven't really touched on making your pelvis's 3d boxes or using landmarks, although your use of the collar bones at this stage is excellent!) Every artist ends up developing their own approach so you'll notice how your gestures differ from other artists.
Hey Matt! I haven’t gotten to that part yet, but I’m pretty sure you could do it in any medium. I think it’s a great idea to render it like you would a comic, since it’s more relevant to your goal. I’m not sure what style comic you draw in but here’s a few David Finch videos : https://www.proko.com/lesson/how-to-cross-hatch-for-comics-david-finch/discussions https://www.youtube.com/watch?v=okQfa98uLlQ Other good ressources: Robert Marzullo and How to Draw Comics . NET on Youtube and this video by page Page One Comics https://www.youtube.com/watch?v=VxNe6jqiTDk (it’s a long video - he starts rendering anatomy around 27 minutes in) I hope this will be of some help!
ok- first off- there's a lot charm in your lines right now, lots of personality to them. But you aren't wrong in feeling like you want to control them more, because there will be times where you need to. So here's an exercise for that. (see image)