Apply the Hexagone brush
I use my simple custom Hexagone brush in three distinct areas for three different effects. First to create a chest plate, then to make some facial chains and finally to introduce some futuristic-looking texture on her chest and shoulder armour. Using it on different layers enables me to create a mask of my patterns, so I can paint inside them to depict dirt or worn edges.
I use several pattern brushes to create the illusion that my character is wearing a lot of collars around her neck. These brushes are so easy to create and will save you a lot of time. I used them when working on Assassin’s Creed 3 and Unity to make most of the patterns on the many costumes, like the yellow embroidery on Louis XVI’s ornate outfit.
Using what’s already been done
Reusing elements that you’ve already painted will save you time. Here I take the stone from her forehead to create a flying spy-bot collar (of course!). I select the stone using the Lasso tool and then copy-paste it on to its own layer using Shift+ Ctrl+ C and Shift+ Ctrl+V. I repaint the highlights and shadows by hand to avoid the copy-pasted feel.
My happy accident Rorschach brushes can be tricky to create and calibrate, but they’re just amazingly fun! Create a technical-looking shape and transform it into a brush. Then in the Natural Media brush window put it on Dual Brush with another graphic-shaped brush and play around with the different sliders to get random shapes popping out of your brush.