How to make a Cloak
This is one of the ways of modeling / sculpting a cloak obviously not the only one, by principles also apply to other things like clothing or other large surfaces with folds and at any scale.
The materials used are: green putty, Milliput standard yellow-gray putty, and in this case, a figure 28mm scale plastic kit.
The tools used are:metal modeling tools, silicone or sharpers brushes, modeling knife and sandpaper water.