Hey emjay247, I was actually able to figure out an easy way to solve the height issue. I'm going to try to write down what I did last night in case it may help someone else:
- I load both the V4 character and S16 into the same scene
- make sure that V4's hip and body x-y-z translation are at 0 (it turned out that the reason why the V4 head created such a huge vertical offset last night was because my figure's hip and Body y-values were not zero).
- also make sure that if you are using any Scale value that would affect V4's height e.g. I had set her to 90% scale, then set it back to 100%
- if it's a S4 character, her height may also be affected by the Proportions dials like Petite, Short, etc. or the S4 Body presets like Caitlyn, Paige, etc. so I set these all to 0 as well.
- what I do next is check to see what morph injections I've put into my V4 character e.g. the popular 182 morphs, V4 Maturing, etc. and I inject the same ones into S16.
- now I go through every body part on V4, one at a time, press Ctrl-C, then switch to Sasha and Ctrl-V to paste the morph values over.
- once this is done, then for sure the V4 and S16 bodies are identical. It's just the head/faces that are still different. But the main reason is that by making sure that S16 has all of V4's morphs, then I'm confident that the height for the head will be synchronized, and it is safe to export the V4 head to an OBJ.
- then obviously just load the OBJ as the morph target and set it to 1.0 and it mostly works.
The ONLY complication so far that I've seen on the 2 V4/S4 characters that I converted to Sasha is the eyeballs. These seem to bulge out (perhaps because they are bigger than the new MT head) or the irises aren't looking straight ahead. I had to use the Axis override dials on lEye and rEye to fix them. I'm not sure why the eyes have this problem, but at least it is not that hard to adjust.
- now you can go and set back the values that you had to zero out e.g. Petite, Short, the scale, etc.
- then the final step is to apply the texture of the V4 character (which can be saved to a material collection) to the new S16 character.