Darth Maul’s costume may look like basic black robes at a glance, but it has more depth. If you want to make a screen accurate version, you’ll have to use different fabrics in different shades of black and focus on layers. Naergi helped a member of the 501st work on his Darth Maul ensemble, and her post on making the costume has several reference pictures and showcases her method for breaking the pieces down. It’s really helpful to see how she approaches figuring the costume out.
For example, here’s what she determined about the middle tunic piece of the costume:
The fabric used for that middle tunic is interesting. [It] is a very nubby fabric with an almost bark-like structure. And actually, I have seen such a structure before. Here’s a picture of a fabric that has a likely structure (ignore the color – the measurement tape is there to indicate the size of that bark-like structure – it’s a centimeter tape; 2.54cm = 1 inch for those of you who need to convert!)
Now, if you were thinking that this is either crinkle cotton or linen, you’re wrong. This photo shows a heavy, loose weave silk noil which was boiled and, in reaction to that, crinkled.
It’s almost impossible to find silk in that weave / weight any more – Aurora Silks has a similar weave, but it’s not exactly the same.
Read more about her research and costume construction at Naergi’s Costuming Site.