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Geograft Issues - G3M

MelissaGTMelissaGT Posts: 2,611
edited August 2018 in Technical Help (nuts n bolts)

Hi there,

I am trying to figure out where I'm going wrong with creating a geograft. I haven't even -done- the actual geograft yet, because I can't get the graft mechanics to work right. For reasons unknown to me, whenever I go through the Transfer Utility process and get to the "Fit To" step, the graft floats above the character's head rather than fitting. As a "control test" I decided to just try and graft a copy of the base character's head without even doing anything else to it. Here are the steps I followed -

  • Mouth HD and Navel HD to Zero
  • Resolution to Base
  • SubD to Zero
  • Export using DAZ settings
  • Import to Zbrush
  • Chop off the head
  • Export from Zbrush
  • Import to DAZ using DAZ settings - matches G3M character still open in DAZ perfectly
  • Transfer Utility - this is where things go awry - please see screenshots for example

Can anybody please tell me where I'm going wrong here? I didn't change -anything- with the model in Zbrush. I just chopped off the head and exported right back to DAZ. Things matched perfectly...and then it won't fit after the Transfer Utility does its thing.

It should be said that yes, I am trying to make a geograft of a character's face/head. I need to add topology that I just can't create properly with morphs. I won't be altering the G3M's facial features that much (just adding some spine-like features), so he -should- still be able to emote the same way as before. However, I can't get far enough into the geograft process to even test that theory. 

 

Post edited by MelissaGT on

Comments

  • MelissaGTMelissaGT Posts: 2,611
    edited August 2018

    Ok, a little more detective work. I tried it with his arm...and the same thing happened. However, I noticed that after applying "Fit To", the arm and hand grew in size (picture attatched). So something is going on with the morphs, I'm assuming...like it's doubling the applied morphs somehow (the arm adding it's own on top of the body's). How do I avoid this? I can't create this graft off the base, un-morphed G3M...it's meant specifically for this customized character.

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    Post edited by MelissaGT on
  • Richard HaseltineRichard Haseltine Posts: 108,091

    If you are making a graft don't work on a morphed figure. The vertices have to align exactly to get a seal. Also make sure you are using the base resolutioin. Even for general fitted items it's best to model around the base shape, though you can set the Source Shape to the current morph and then check Reverse Source Shape from Target in the options.

  • MelissaGTMelissaGT Posts: 2,611
    edited August 2018
    Richard Haseltine said:

    If you are making a graft don't work on a morphed figure. The vertices have to align exactly to get a seal. Also make sure you are using the base resolutioin. Even for general fitted items it's best to model around the base shape, though you can set the Source Shape to the current morph and then check Reverse Source Shape from Target in the options.

    I am working with the base resolution for sure, as I outlined in my steps above. How can I make the graft on the unmorphed figure? His base face is so...specific, that if I use the small-headed, soft G3M base face, it won't look anything like what I'm trying to do in the end. If I add all of the bone spurs and specific geometries to the base figure first, by the time I add his underlying shape back in, they won't be in the same place anymore. I want to be able to add the items to -that- face. 

    I'm trying an experiment - 

    • 1 - Export unmorphed figure via GoZ
    • 2 - Create base, unaltered graft (just the head - no changes yet)
    • 3 - Import back into DAZ via GoZ (obviously it prompts me to create a new item)
    • 4 - Follow the Transfer Utility process to create the graft because "Fit To" now forces the unmorphed head to match perfectly
    • 5 - Export the now-grafted head (now morphed in the base face shape I want) and then add my customized topology in Zbrush
    • 6 - Import back into DAZ and update that graft's geometry

    I'm crossing my fingers here. There has to be a way to make a graft for an already-created character. I can't be the only person out there who changes their characters fairly significantly from the base G3M model (taller, more muscluar, etc). This guy's head is almost twice the size of G3M's head. 

    Post edited by MelissaGT on
  • Richard HaseltineRichard Haseltine Posts: 108,091

    Grafts work by having a ring of vertices around the edge(s) that exactly match the ring around the mesh they are going to replace. You would need to make the graft to fit the base mesh, then give it a morph to match your custom shape. I'm not aware of any way to avoid that.

  • MelissaGTMelissaGT Posts: 2,611
    edited August 2018

    That's where I'm confused - it does match. It matches the morphed figure. If I export to ZBrush as a morphed figure, and import that morphed figure back into DAZ, they do match. Upon import, it still lines up polygon for polygon. Where it goes wrong, is applying "Fit To". When I click "Fit To", it applies the morphs again to the graft...doubling what I had, and throwing everything off.

    I guess what I'm trying to figure out is how to stop it from doubling down on the morphs when I get to "Fit To".

    Post edited by MelissaGT on
  • Richard HaseltineRichard Haseltine Posts: 108,091

    Matching the morph is not going to help, it has to match the base shape - and I would not expect the reversal process to be precise enough for that.

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