Hii uuumm , sooo , i've seen some drawings you've done , and i've noticed some drawings if people with 4/6 arms , and , im curius , did you just came up with the anatomy or did you use a guide or something like that ?? I've been struggling with a 4 armed oc and was wondering if you could tell me how you do It
Howdy Sharm! So sorry about the late response 😭😭😭
To start… I’m a huge anatomy and physiology nerd (though sometimes my art doesn’t present that way haha!), so figuring out the bone and muscle structure is where I started. (Also I’m so sorry if this is too much information 😅)
In human anatomy, there are about thirty bones and four major muscle groups that contribute to the full structure and movement of AN (one) arm.
So with bones, it is important to think about how long the sternum (middle part of rib cage) should be so the multiple clavicles can all connect to it; how the multiple shoulder blades (scapula) interact with each other (meaning does each arm have its own shoulder blade/socket? Or do some arms share a joint?); and the ribs’ length also matters but we won’t go that far into it.
Now that you’ve figured out the bones, looking into how muscles lag over them is the next step!
To make it short, you really only need to pay attention to the pectorals (chest) and deltoids (the shoulder muscle). If you have multiple arms, you’ll have to have multiple pecs to have a full range of motion; so, adding a pair of smaller pectorals underneath the main pair is how I’ve tackled this problem. With the men, it just looks like two pectorals next to each other; but how I’ve designed women (since boobs) is by giving them only one pair of breasts. Women’s chests have the same muscular structure as men with the exception of extra fat deposits and mammary glands (for breast feeding).
I haven’t really figured out shoulders.. because.. how?? But the temporary solutions I’ve made are by having the arms either connect at the ball and socket joint (so one shoulder per arm) or having the inferior (lower) arm much lower than the superior (upper) arm… giving both enough space to have a full range of motion :)
But you don’t need to be super anatomical with it!! For example: here are some rough sketches I’ve saved that explain the anatomy of some of my characters.
But there’s also a bunch of reference from movies, manga, anime, cartoons, comic, and even religions!
There are many paintings of hindu gods/goddesses showing their multiple limbs; so if you’re really having trouble, those religious paintings are always a great reference! Just remember to be respectful of the original artwork :)
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