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JavierLQ
Posts: 1
Registered: ‎07-06-2010

Extracting normal maps generating seams

860 Views, 10 Replies
04-13-2012 09:43 AM
Hi everyone,

I have been recently running into an issue with maya/mudbox workflow. Currently working on a character model for a class. I have spent some time sculpting the base mesh, then re-exporting the level 0 subdivision mesh from mudbox to maya, and extracting the normal map and applying it in Maya. The problem is that Mudbox is generating a seam on only a certain part of the model (one side of the leg) where the map wraps around. Here is a picture that might illustrate it better, I've highlighted the problem area and the spot in the UVs.

I have tried all the different options when extracting from mudbox, and they all generate that same seam. Any idea on what could be happening? I would appreciate any help!

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Valued Contributor
mrAFK
Posts: 91
Registered: ‎03-17-2012

Re: Extracting normal maps generating seams

04-16-2012 09:58 AM in reply to: JavierLQ
and how does the normal map look? (plz show with UV over it) feels like the fill setting is not correctly configured
3D & Animation Teacher
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Valued Contributor
sergimen2001
Posts: 58
Registered: ‎03-23-2010

Re: Extracting normal maps generating seams

04-21-2012 07:33 AM in reply to: JavierLQ
Huumm
I have the same problem that you.
I suspect that happens with the Mudobox 2012 SAP 64Bits....That never happens to me with Mudbox 2010...
It's frustating,because now I can't Fix it.The file nos was saved with Mud 2012 SAP,and now is impossible try to extract the Normal Maps qith Mudbox 2012.
Hundred of Hours working in the sculpting,and painting(and other hundred of previous hours testing the basemesh generated in Max for correct UVs,and for eliminate any Ngon or other issue),
others hundred of Hours try the extraction with all the parameters posible,and nothing happens.
Simply the Normal mas,(and Displace maps too),not are concident 100%,in the seams like you shown in the images.
When I see the map generated,is like Mudbox uses some strange UV coordinates,the Normal maps escape from the UV shells...Looks mi Images for more exactly idea:
This Show the Normal map generated,nad I superposed with photoshop for comparison the UVW Template generated for 3DS MAX.I sure that I am using the same UVs in MAx and Mudbox.
The model in Max that will receive the Normal maps was Turbosmoothed at 2 iteratios only.(I don't need more).
The seams are mos noticeable in Mudbos than MAX,but finally showing the model in test render very near,the the deatils of the seams in the Normal mapping are noticeable.
Other parameter that I tried was the edge bleed,in teh Windows/preferences dialog.But this only fix problems due the painting and work only for seams that can apears like "not painted",in the Max o other render platform...
The second image,shows the normal map seams in Mudbox 2012 SAP 64bits.
And the third image shows any,(there are more) of this seams in 3DS MAX 9 64bits rendered with scanline render.
IfNor anybody knows that happens I will be very thankfull to know the answer.
Greetings:
Sergio Mengual.
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Valued Contributor
sergimen2001
Posts: 58
Registered: ‎03-23-2010

Re: Extracting normal maps generating seams

04-21-2012 07:35 AM in reply to: JavierLQ
Sorry,here are the images...

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Valued Contributor
sergimen2001
Posts: 58
Registered: ‎03-23-2010

Re: Extracting normal maps generating seams

04-24-2012 08:03 AM in reply to: JavierLQ
This is incredible!
Nobody can answer our questions?
This is the third time I look for help here and no one answers.
I'm starting to believe that The Area is not the best place on Internet to find support and/or help ...
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Valued Contributor
sergimen2001
Posts: 58
Registered: ‎03-23-2010

Re: Extracting normal maps generating seams

04-25-2012 10:15 AM in reply to: JavierLQ
It's like I had thought ... Definitely, The Area, is the worst place on the Internet to get some help or support ...
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*Expert Elite* | Moderator
cg_oglu
Posts: 2,990
Registered: ‎08-22-2006

Re: Extracting normal maps generating seams

04-25-2012 12:26 PM in reply to: JavierLQ
i dont know whats causing this problem...
could you upload a part of your mesh..?
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Valued Contributor
sergimen2001
Posts: 58
Registered: ‎03-23-2010

Re: Extracting normal maps generating seams

04-25-2012 02:42 PM in reply to: JavierLQ
i dont know whats causing this problem...
could you upload a part of your mesh..?


Not necesary Oglu...
This problem happens whith this custom Basemesh,and with Mudbox's Included man base Human Boby, basemesh too...
My Nothing is bad with my basemesh.Y recall you that I probed this for all the posible mistakes:
Overlapping UVWs,(se the image showing the UVWs),Isolated vertices,Overlapped edges,N-gons,and more...In adttion,the UVWs are en one single tile.
My basemesh was tested and is in perfect state.
Is Mudbox 2012 SAP the ´problem.Because the same problem happens with the Basemesh included with Mudbox...
If you dont know the answer at this problem,at least,say me if you have this same problem with Mudbox 2012 SAP...At least the user that start this thread and me,have the same problem with it.
My last test in Mudbox 2012 SAP,was probe the extraction of normals and Displace in the cube mesh provided with Mudbox,in to ways:
1:smileyfrustrated:ubdividing with no Smoothing the UVs option in the Add Subdivision Level Menu.
2: And Subdividing With the Smooth UVs Option On.
In the 2 ways the results was the same:
In the Mudbox viewport, the normal and Displaced maps extracted show seams,like you cann see in the images that I upload.
Rendering the model with this extracted maps in MAX,the result is the same.
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Valued Contributor
sergimen2001
Posts: 58
Registered: ‎03-23-2010

Re: Extracting normal maps generating seams

04-25-2012 02:49 PM in reply to: JavierLQ
i dont know whats causing this problem...
could you upload a part of your mesh..?

Or,at least,there are some service pack for Mudbox 2012 SAP,that possibly can fix this bug?
I not have problem to return to work with Mudbox 2010...But we are talking about 2 works,2 models, stopped in his final development phase,with an development time about 3 months for every one.And is impossible return to finish the extraction in Mudbox 2010...
Perhaps importing these in OBJ or FBX subdivided and sculpted,for re-import in Mud 2010,and extrat maps to the base mesh.(problematic too).
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Valued Contributor
brian
Posts: 71
Registered: ‎08-22-2006

Re: Extracting normal maps generating seams

04-25-2012 03:31 PM in reply to: JavierLQ
I'm not the best person to give advise on how Mudbox handles normal maps or other "under the hood" problems, but I can offer a suggestion for how I have addressed this issue. Simply sample the normal map color or clone stamp the color adjacent to the area of the problem and paint over the problem area in the NM channel to eliminate the problem.

When I researched this problem some time back I found consistent discussions about NM's needing cleanup work regardless of the product used, so this may not be a bug, but rather a feature.
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