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How to Transfer details from incorrected sized mesh to a correctly scaled mesh?

ZBrush Usage Questions
#1

Hey everyone,

I’m in need of help. So I just came to realize that my mesh isn’t to the correct real world scale. So my process so far has been:

  1. I have taken all my subtools and merged them, decimated etc. (make the poly count smaller).

  2. Then I went into Maya and resized the mesh to the correct scale.

  3. I reimported the correct scale mesh into Zbrush and appended it to the incorrect scaled mesh.

  4. I went into Transpose Master and scaled up the incorrect scaled mesh to the correct scale, and then I went to apply the modifications by transferring my changes to the original mesh through the Tpose to Subtool button.

  5. Then I came to realize I lost all the detail I put into my mesh.

What am I doing worng? Is there a way to get my model to the correct size and keep all my hard work?

Attachments

Scale comparison.jpg

WhatHappensWhenNearActualScale.jpg

Missing Detail.jpg

#2

So I just wanted to add, that the correct size issue is pertaining to when I am in the render phase. I’m rendering in Modo and I would like to import later on a different model into my scene and composite the models in the scene interacting with each other. So that is why I’m concerned with the size of my mesh (dragon), also for lighting etc.

#3

Not sure, but my guess is that you have escalated a lot a model with subdivisions and layers, is that true?

#4

The model no longer has layers but it does have subdivisions. However, I was informed about a correct way of scaling my mesh through the transpose master, but it seems to not being working for me, for one reason or another.

#5

You could try to delete the lower subdivisions leaving only the higher one, use transpose master, and then rebuild them if you need them back. Without subdivisions you won’t lose any detail, that will happen as soon the model is scaled. Simply when more the model is scaled the difference is more obvious.

#6

So I found a solution that oddly works. I just randomly guess the scale and through trail and error I get it close. Or I can count the units when I use the transpose tools like move scale or rotate. It doesn’t make sense since its not what I was told to do but it works.

#7

I don’t understand what is your workaround.

#8

So I was told the way to correctly scale things in Zbrush if when you export them is through the transpose master. Though however, for some reason for my model, when I imported the size reference, when I scaled up the incorrect sized mesh it would loose detail. I then tried guessing the size I would have to scale up my incorrect mesh (in other words I didn’t append the correctly sized reference model) and then my mesh scaled up correctly and didn’t loose any detail.

#9

I guess you mean you didn’t use transpose master, as transpose master is who creates the problem with subdivided meshes.

#10

No I still used transpose master. It was just instead of using the reference mesh to know how much to scale my incorrect sized mesh I had to not append the reference mesh and it then worked. I then kept all my detail. What I ended up doing was using the transpose tools and drew a line from the top of my mesh to the floor plane and wrote down the units and then tried to replicate close/exactly the same amount of units.

#11

I don’t understand using transpose master for this.

When you import the incorrectly scaled model and append it to the correct one, why not just click the unify xyz button?
This should bring it to the same size as the correct one.

Or, if that doesn’t work, just look at the xyz size of the correct one (Geometry > Size), switch to the incorrect one and enter in the correct xyz size.

Once they are unified to the same size you should be able to project detail from the one to the other.

Am I missing something?

#12

I was using transpose master since that is what my instructor showed me. However, I will look into what you suggested and try that. I did try the unify button before and all it was doing was making the bigger one smaller not the other way around. However, I didn’t ever think of looking at the xyz cords. I’ll get back to you if that worked or not.

#13

I think the unify will depend on which subtool is loaded first… I could be mistaken about that.