Retopology errors

[Anonymous]

This is what a Wavefront mesh imported from Blender looks like after I retopologize it in Mudbox. I assume there is corruption in the mesh that confuses Mudbox because I am unable to reproduce the problem with an object created in Mudbox. Any ideas about what is doing this and how I can clean it with Meshlab or some program like that? The exported FBX file is attached. 

[jon.bell]

Hello,

Thanks for your questions. I downloaded your attached .fbx file, but when I load it into Mudbox, Motion Builder, Maya or 3ds Max, all I get is an empty node -- a point helper or a tiny Dummy object in 3ds Max.

I don't know what the issue is with Blender .fbx export, but you might also check with their support forums to see if they have similar issues reported, or if someone has some insight into this. If you can try re-exporting your geometry (including the original .fbx file), we could take another look at it. Please let us know!

Best regards,

[Anonymous]

Thanks so much for the reply. I tend to delete these problems and so of
course I cannot find a really good example of the flow with both the
imported fbx. file and the Mudbox file. I am finding a lot of files over
the past few months where I didn't apparently have this problem so I am
wondering if it is not the files but a software transient. Attached is a
Mudbox file showing the problem appearing very slightly inside the eye
sockets. I will post if the problem appears again in its full messiness.​
torso_29_july_2017.mud

​

[jon.bell]

Hi,

Could you please re-upload your attachment? It doesn't appear in your last email. Thanks!

[Anonymous]

I am having a little trouble uploading to the forum. Can you get the file from Google drive?       https://drive.google.com/file/d/0B9XR0JBSX-dPWjREd0ZvTHJrNWc/view?usp=sharing

[Anonymous]

My apologies. I am having trouble uploading a Mudbox file to the forum. I
have posted a link to Google Drive. Can you access the file from Google?

[jon.bell]

Hi,

Thanks for the link -- I was able to get the file and I'll look at it this afternoon.

Do you have the original .fbx file you exported from Blender? I'm curious if we can import it and see what's happening with it. Thanks!

[Anonymous]

Here is a fresh example compete with the .fbx file that I imported into Mudbox from Blender, and the Mudbox file. 

[jon.bell]

Hi,

Thanks for your patience on this and for exporting your new meshes.

I loaded your Torso Mudbox mesh, then re-exported it as a Base level mesh from Mudbox so I could load it into 3ds Max 2018. Mudbox did note a number of errors in the original mesh, which you can see in the attached image. I then loaded this simplified mesh into 3ds Max, and the polygon geometry definitely seems distorted, as you can see in the attached model.

I don't know why Blender would export geometry that Mudbox doesn't like, but I'm wondering if you should check your geometry before export from Blender -- making sure there are no coincident faces, welding vertices, and essentially making your geometry as airtight and symmetrical as possible. In addition, if there's a way to check that all face normals are pointing properly outwards, that would probably help as well.

I can continue looking at this at bit, although I can't really test it with Blender (I'm not familiar with its workflow). If you have any further feedback, please let me know. Thanks!