Best/easiest to create them on a low poly mesh with strong loops throughout the dominant facial landmarks. Easier to manipulate and create strong feature interrelations this way. Learning how to use subtractive morphing and intermixing values of seperate constituent blendshapes is also useful. If you create a bunch of smaller morphs that when mixed together arrive at the full morph it makes working alot more flexible and you can better control how the final mixing of different expressions comes together. When you apply an open mouth morph, for instance, you want that morph to work well with the others. Blendshapes. Or... create an expression rig. Something that's entirely feasible at this point in Posers development... greatly aided by the in Poser addition of control props (handles) no doubt.

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W10 Pro, HP Envy X360 Laptop, Intel Core i7-10510U, NVIDIA GeForce MX250, Intel UHD, 16 GB DDR4-2400 SDRAM, 1 TB PCIe NVMe M.2 SSD

Mudbox 2022, Adobe PS CC, Poser Pro 11.3, Blender 2.9, Wings3D 2.2.5

My Freestuff and Gallery at ShareCG