What the in the blue blazes is 'iterative drawing'? Check out Sycra's video
According to Wikipedia: Iterative design is a design methodology based on a cyclic process of prototyping, testing, analyzing, and refining a product or process. Based on the results of testing the most recent iteration of a design, changes and refinements are made.
So when you draw with this concept in mind, you can take it many different ways. In this collection of head sketches, I stuck to profile heads, all facing the same way, all mildly feminine looking. I worked at altering the placement of the nose, the eye, the hair, the chin. I could get even more specific and keep all those things the same and only change the ear or eyebrows. The point is to get your hand used to these moments in rapid succession thereby speeding up the practice/learning process.
Now, for these I was only drawing out of my head. No reference. When a reference gets involved, there's another step for your brain to tackle so, while it is an increased learning experience on it's own, you will likely slow down. For me, this is because I look at the reference and analyze placement and shadow etc., then I sketch what I'm processing on what I'm seeing instead of just putting pen to paper and experimenting in a more free form way. Both methods have their place.
I felt like I got a lot out of Sycra's video and out of this practice. Definitely something I would like to do more often. It's helpful when I'm feeling stuck without inspiration. It makes me churn my own mind a bit instead of looking outward.
My favorite is the top middle head. I liked the way the protruding chin looked in combination with the nose and bangs.
Give it a try!
with love - M