How to turn a 2D head sketch into a 3D model of a head sketch.
[I don’t know if it would work – I’m laying out the concept here, but it seems there’s enough information that it *should* be simple enough to make a 3D model in the shape of your actual head something like that. I *think* this is one of the ways they do it already and have been doing it for a long time. I’m just working ‘up’ the logical process that might be involved]
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n the end, the first sketch would be mapped to the reshaped 3D skull, allowing for accurate 3D sketch animation based off of a 2D image at a 3/4 head shot.