>>7752435
Forgot to mention, but also try to design the folds instead of copying the exact way the reference is.
It saves a lot of time and you practice your own design skills.

Sometimes the drawing will get too busy with folds and it's better to fade the minor ones or draw major folds with lesser faded folds. Being clean helps a lot with readability for when you start rendering it.

Idk, i'm not a pro myself, but i noticed those things and it helped me a lot.