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Author Topic: Shelling photoscans  (Read 20149 times)

Wishgranter

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Re: Shelling photoscans
« Reply #15 on: February 14, 2014, 12:44:52 PM »
Hi All, Geomagic is perfect tool for the hollowing of textured parts, its "easy", when the mesh is "clean, without any problems. For the skull i need approx 1 hour, to clean problems there, normally when is the mesh prepared, i get it under 10 minutes...... With all UVs and  vertex colors other stuff, even when need to delete few problematic areas....


There is way to do it even in Zbrush, as we have tested, but you have not the precise control about the shell thickness.... and it need a bit knowledge of the Zbrush sw 

It took me few day to get it working with Geomagic shell commands, as there can be problems when the mesh is not absolutely clean from errors in mesh. - as i asked few months back

Have used the Zcorp 3D 3DEDIT Pro, but it has problems with larger or "complicated" meshes, so sometimes we could not make hollow models there.....

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chrisd

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Re: Shelling photoscans
« Reply #16 on: February 14, 2014, 09:57:31 PM »
wishgranter,

Are you indicating Geomagic can handle repairing & shelling without destroying UVs or other texture info?

When the shell is created, where is the color coming from  ... nearest points?

igor73

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Re: Shelling photoscans
« Reply #17 on: February 14, 2014, 10:49:26 PM »
" but it's not a problem... you just re-import the Hollowed model in Pscan and redo a texturing.. voila.. "

Sounds like a good approach.  Will try this. 

Wishgranter

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Re: Shelling photoscans
« Reply #18 on: February 15, 2014, 12:19:36 AM »
Hi chris, if want upload model and can show it, its how they do the internall parts..... Will be back in office in 4 days.......
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chrisd

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Re: Shelling photoscans
« Reply #19 on: February 15, 2014, 05:00:18 AM »
Hi chris, if want upload model and can show it, its how they do the internall parts..... Will be back in office in 4 days.......

Not necessary to upload a file ... I'm taking a class in Geomagic next week, so I will probably learn how to do it there.

thanks
 

scanlab.ca

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Re: Shelling photoscans
« Reply #20 on: February 19, 2014, 07:52:13 PM »
Hey there Igor,

The way we do it here at Scanlab is through zBrush.

1. Import your model
2. Duplicate the tool
3. Dynomesh the duplicate to 128 or something low
4. Deflate the duplicate to -6 or whatever works in your case.

5. Dynomesh the original tool
6. Merge Down the two tools
7. PolyGroups - Auto Group the new combined tool by continuity
8. Isolate and make visible only the inner Group(the one that's gonna be used as a boolean object)
9. PolyGroups - Group As Dynamesh Sub
10. Make the whole tool visible and Dynomesh again at required resolution.


Done.
« Last Edit: February 19, 2014, 08:05:56 PM by ScanLab »
Best regards,

Ruslan Vasylev | Scanlab Photogrammetry
S: https://scanlab.ca | E: ruslan@scanlab.ca | T: 1 (778) 991-5157

EMULAT3D

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Re: Shelling photoscans
« Reply #21 on: February 19, 2014, 09:09:00 PM »
Great tutorial Ruslan!

Have you guys seen this tutorial?:
http://www.youtube.com/watch?v=TFgbGN_VphY

Thanks!

scanlab.ca

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Re: Shelling photoscans
« Reply #22 on: February 19, 2014, 09:36:17 PM »
Oh cool!

I did not see the video, but was thinking of recording something similar.

Thanks for posting this EMULAT3D!
Best regards,

Ruslan Vasylev | Scanlab Photogrammetry
S: https://scanlab.ca | E: ruslan@scanlab.ca | T: 1 (778) 991-5157

igor73

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Re: Shelling photoscans
« Reply #23 on: February 19, 2014, 10:54:44 PM »
Thanks  Scanlab. Don?t have Z brush but might look in to buying it. It is at an OK prize point compared to Maya and others.   Herd lots of great stuff about it.  Is it mostly a sculpturing modeling program or is good for hard surface modeling to?  Good render engine, animation tools? 

Cinema 4D looks really interesting to, Don?t know if it has any shelling features though. 

scanlab.ca

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Re: Shelling photoscans
« Reply #24 on: February 19, 2014, 11:40:52 PM »
Thanks  Scanlab. Don?t have Z brush but might look in to buying it. It is at an OK prize point compared to Maya and others.   Herd lots of great stuff about it.  Is it mostly a sculpturing modeling program or is good for hard surface modeling to?  Good render engine, animation tools? 

Cinema 4D looks really interesting to, Don?t know if it has any shelling features though.

zBrush is mostly used for organic stuff.
Hard surfaces are also doable in zBrush, but I would use other, better tools for accuracy critical projects. It does have a good render engine, but is not an animation package.

I don't know much about Cinema 4D though.
Best regards,

Ruslan Vasylev | Scanlab Photogrammetry
S: https://scanlab.ca | E: ruslan@scanlab.ca | T: 1 (778) 991-5157

chadfx

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Re: Shelling photoscans
« Reply #25 on: February 20, 2014, 08:26:59 PM »
It looks like Meshmixer was updated recently, with some improved tools that could help for shelling and overall prep for 3D printing:

http://meshmixer.com/forum/index.php?topic=1659.msg3399#msg3399

scanlab.ca

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Re: Shelling photoscans
« Reply #26 on: February 21, 2014, 05:50:45 AM »
Oh, nice! I was wondering where this one went, remember it from Siggraph2011.
Best regards,

Ruslan Vasylev | Scanlab Photogrammetry
S: https://scanlab.ca | E: ruslan@scanlab.ca | T: 1 (778) 991-5157

igor73

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Re: Shelling photoscans
« Reply #27 on: February 22, 2014, 01:24:37 AM »
Chadfx.  thank?s for the tip.  Downloading now. 

igor73

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Re: Shelling photoscans
« Reply #28 on: February 22, 2014, 01:44:51 AM »
Shelling  tutorial http://www.youtube.com/watch?v=ILKspBZjSDM&feature=c4-overview&list=UU0OsvzcGE6iqSP8lW3-M9Dg

Haven?t tried it yet but looks very promising.   For those of you that do not use a mododeling program it seems it has some easy to use sculpt tools for basic clean up to.