The Back
The ACU's back will be quite challenging: lots of curves and details. As with the front of chest, the technique is to build it up layer by layer.
Thanks to the flexibility of having the original 3D Studio Max model to use as reference, it was possible to rotate it to any position and even to create an exploded diagram of sorts. These images were printed to use as reference in the workshop.
After completing the detailing for the lower back (top left), I set about creating the round tank for the upper back. Cue more shaping and pinning with toothpicks, eventually joining it to the main chest piece to complete the preliminary chest construction.
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