Model from photographs
I had 2 questions relating to the use of photogrammetric methods when modelling characters:
1) If I obtain a polygon mesh of a human head from a software such as UZR or Imagemodeler using photos, such a mesh looks very accurate externally but lacks all the internal features required of character meshes (e.g. lips have to part if required, the correct cavities must be present within the mouth, ears etc.). In short there’s no difference between a mesh of a teapot and that of a human head – both are a solid block of polygons. Is there a way of targeting this external geometry to an already available properly designed character mesh which has all the correct internal properties? E.g. using such a “face mask” obtained from photos, is there a way to ask an existing character model to conform to this external outer shell?
2) Second, a number of photograph-to-3D modelers output half-ready faces and textures along with all required blendshapes to Maya (e.g. Facegen is a popular one). If one wanted to refine this model in Maya using sculpting tools, is there a way to apply the changes simultaneously or automatically to the blendshapes as well? Or does this HAVE to be done individually manually?
Thanks in advance.