I’m working on a costume of Misa Amane from Death Note, and she wears *a lot* of leather. Any suggestions for how to make other materials look like leather?
I assume you are doing her classic outfit?
For this, you have far better options than leather that are cheaper and easier to sew.
I would look for a garment weight stretch faux leather. This will be a knit fabric coated on one side with a plastic material to make it look like leather, but it will breathe and stretch like a knit fabric. These types of faux leathers are widely available, even at chain fabric stores like Joann.
Another option is wet-look spandex. This will be even more stretchy, which may not be the effect that you want, but will be shinier than most other materials.
If you can find a garment-weight non-stretch faux leather, that would be