Forehead details were fun. I was really getting the hang of Green Stuff at this point, still sticking to the wooden tools I had carved initially, and more comfortable with the amount of water involved to properly lubricate and sometimes soften the material. Green Stuff sculpting must be done with a jar at hand.
Sculpting details on the Ambull's 'forehead' was fun, I redid the biomechanical tubes and meshed the mottled texture into the tubes. All the while I was thinking about how paint-able I wanted it to be, lots of recesses and lots of little raised bits to catch a nice drybrushing.