Excellent write-up WTB. I personally use ZBrush, because it gives far more control over the shaping process in 3 dimensions. Using your method - you can get an excellent front-on likeness, however I found once you try and get the profile matching too, the std morphs change the front-on shape too - so you get in this horrible cyclical dial adjustment spiral. The attacted was done in ZB2, and you can see both front-on and profiles are heading in the right direction... You can also see there are details in this morph that are not possible using the std morphs - like the fine mouth shaping, nose bending and the deep furrowed eyes. Of course using ZB comes at a cost (it's more expensive than Poser).
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