Are there any good tutorials for over arm wings? I'm planing a cosplay for Ultimate Kars from Jojo's Bizarre Adventure, and I can't find many tutorials for the type of wings I need
For wings like this, it is mostly going to be a sleeve with feathers or a feather substitute hanging off of it. Depending on manga or anime, Kars seems to have either pretty much regular arms colored black with the long feathers hanging off (anime version) or has a lot of smaller feathers up near the arms and just a ridge without feathers near the top (manga version). Which way you go is up to you.
Here’s a tutorial that lays out the process nicely. You may want to stick with the faux feathers for this type of design, since the wings are very large and will be very heavy and impractical with real feathers, though real feathers can create a great effect. EVA foam (I would use the large rolls of craft foam if you go this route) can be another option. Fabric would be a less realistic but more comfortable and practical option, since it wouldn’t be stiff and possibly hitting things when you wear it.
Whichever way you go, you will need to either make or buy the smaller feathers for up near the arms, which can be real feathers, real feathers cut down to smaller sizes, or your faux feathers cut to smaller sizes.
If that one tutorial isn’t doing it for you (and it does seem to be one of the only for this style of wing), I’d look up videos and photos of people who have made arm wings so you can see them in action -- while this isn’t a tutorial, it would give you an idea of how they move and possibly how they go together if you can break down the component parts that you see.
I hope that helps! Good luck :]