Here is an example of the kinds of results you can get in iColorama by using a simple set of brush strokes to distort a figure over. It's how I created my Torn Ladies and this Split Personality.
I started with this image, which I'd previously created based on a Rijksmuseum painting. The Rijksmuseum website provides high-resolution images free to use and modify for any purpose, in their Rijksstudio. You can see how I made this image here.
In iColorama, I painted these brush strokes on a blank white canvas, using Brush/Paint.
Now in Effect/Distort, I distorted the woman over the pattern. After a bit of cleaning up and adjustments for tone and color, here is the result.