Okay, that turn off the IMPORT AUTO SCALE… I need it to turn off the EXPORT AUTO SCALE
If you are importing with auto-scale turned off for FBX then the Export scale will be set to 1, which is what you want. You actually don’t need to worry about auto-scaling at all for export as the scale will always be correct when exporting.
But make sure that your import settings in Modo are correct for FBX. The default units for FBX are centimeters (cm), so you will need to check that Modo system units are also cm, or the correct conversion is done on import.
That wasn’t happening with my model… I am testing a head I modeled in Modo and it is real world scale… when I use FBX export, and import it into Modo, the head is wayyyyyy too small and it doesn’t match. If I GoZ that same head into Modo, the scale is correct. I am using meters which is the default units for Unity.
EDIT: And I just changed my units to cm and the head model is still the same… let me test this again with everything at default.
Zbrush’s real world scale is in inches I believe. If you match it, your scaling problem should go away. Resolves some weird import/export issues, like having to use gigantic brush sizes in zbrush - or having to initialize imported meshes. Not 100% sure it was inches, been a while since I messed with that, but I’d bed its in a similar size setup.
I’ll do that when I get home. Also in my export options, the scene scale is set to 1. And funny that you mentioned centimeters, because ZBRUSH default units seem to be in cm.
EDIT: Would be nice if GoZ did the blendshape export too
Yes it uses “units” but those units are still based on a scale somewhere in the code, and knowing that allows you to setup other programs to work with zbrush, and its “units” and Halo figured it out, CM is what I was thinking of. It really works, try it out
Thanks, that’s perfect. When I import this into ZBrush then the Transpose line gives a measurement of 100 (see image) which is correct for a measurement of 100 cm in your original. I imported using FBX with auto-scale on, as with the standard installation of the plugin. The Tool>Export sub-palette shows that ZBrush has scaled the cube down to 1/50 on import and will scale up by 50 on export. This is what I’d expect.
The second image shows both cubes imported into Maya. The one on the right is your FBX from Modo, and the one on the left is the same cube exported as FBX from ZBrush. As you’ll see, the cubes are the same size and measure 100 cm (cm is Maya’s default unit).
So this shows that if FBX files exported from ZBrush are coming into Modo at the wrong size then there must be a setting you are missing. I don’t have Modo, so I can’t test but in Maya, for example, you need to check that the units are the same or the appropriate scaling is applied.
Good morning Marcus, I have modo set to centimeters so I will have to play around and see what settings will work for FBX export. My models need to expirt correctly or I can’t use the fbx export
The scale is simply a generic unit. In other words, if you have a vertex which has coordinates (1,1,1) then that is one generic unit away from the origin along each axis. That’s all there is to it. The actual unit is determined by the program you are working in, so that, for example, Maya regards that as 1 cm from the origin. Some 3D file formats, such as FBX, include the unit they are using. But others, such as OBJ, do not. ZBrush doesn’t use anything other than the generic unit, so you can basically call it what you like. One generic unit can represent a mm or a mile in ZBrush, there’s no difference.
I’ll have to play with the export scale. Should be pretty easy once I get around it. it would be awesome for an update if I could GoZ meshes with blendshapes :). That will make my life eaaier. Intially, the model was created in zbrush 4r6 and exported 1 to 1. I may have to export the character from modo and see what the export scale ends up being. Thanks again.
I’ll say this again: the FBX export from ZBrush is exactly as it should be. You don’t need to touch anything. The Cube FBX from Modo you sent me and the same cube exported from ZBrush are identical. There are no differences at all. I showed you that with the Maya screenshot. Therefore the problem is with how Modo handles importing FBX.
EDIT: I downloaded Modo 801, and can export FBX to ZBrush and back with no scale issues using the default settings. Perhaps you have a different Modo version?
So I did a new export test by importing an FBX from my unity project, and the model scaled up over 10,000 times it’s size (it was 170.8 units tall) and in Modo it’s 1.70m tall… so to work around this, I had to rescale the model 9900%… so until I get Modo 801, I will have to do this the old fashion way.
I’m bumping this topic again to try and solve the issues I am having with FBX files. I have managed to export FBX files to and from modo by saving out a FBX file from Modo 701 with the scale at default… it was a success and they were the same size when I did the export from ZBrush back into Modo… I also loaded up an FBX file from my Unity project and exported it using the FBX export, and it successfully scaled to the same size within Modo. The transpose reads the exact same size as my character in Unity 170.58cm
Now the new problem is trying to solve the scale issue from existing zbrush files to FBX… the models are STILL too small and I am forced to scale them up.
EDIT #2: So, if I change the export scale to 100, this seems to fix my issue, so now I have to be careful about how I model the characters and carefully export them. I model my characters to real world size and this is a workaround.
Another way you could do it is to import into ZBrush an FBX from Modo with something of the size you want (a cube would do). Then use that to scale your character correctly before export:
Import the cube into ZBrush.
Append your character to the cube as a subtool.
Using Transpose, or Tool>Deformation>Size, scale the character until it’s the size you want.
Delete the cube.
Export the FBX to Modo.
If you do this after you’ve completed sculpting the character you will avoid any scale-related brush problems in ZBrush.
