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Author Topic: Strange artifacts around edges of model  (Read 5320 times)
pol3waf
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« on: April 07, 2011, 06:05:57 pm »

Hello there,

since the Normalmaps are now working I encountered some odd thing:
There are some strange artifacts around the edges of my models. Those in the light parts go black, others in shadowed places show up quite bright (eg. screenshot)

Could someone please help me with this?

Regards,
pol3waf
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LD
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« Reply #1 on: April 08, 2011, 08:33:57 am »

Hi pol3waf,

From what I see on the picture, it seems that the the leaves are 3d objects (2 meshes, one for each side of the leaves).

I'm quite sure the mesh is open and the vertices are not welded.
Try to attach the meshes together and to weld the vertices of the edges together, in order to get a non-open mesh.



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LD
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« Reply #2 on: April 09, 2011, 09:11:19 pm »

Hehe, I was totally wrong in my last post, it seems.

I see the same artefacts on this page ( http://x3dom.org/x3dom/example/x3dom_creaseAngle.html ) and the geometry seems to be well done.
Check the basis off the neck, caudal view.

It seems that a correct CreaseAngle does a weird rendering ... Uh.
Something to do with back-face culling ?
« Last Edit: April 09, 2011, 09:15:56 pm by LD » Logged
pol3waf
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« Reply #3 on: May 06, 2011, 01:44:11 pm »

Any Idea how to fix this?
Reducig the Crease Angle is not a really good idea, since the model would look really blocky...

regards,
pol3waf
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jbehr
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« Reply #4 on: May 11, 2011, 09:40:38 pm »

Could you provide normals from the modeling system?

best regards
johannes
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pol3waf
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« Reply #5 on: November 06, 2012, 06:14:46 pm »

Hello again.

I'm stuck with the same problem again about one year later :-(
Before I could just solve it by raising the mesh resolution, but this is not possible this time (a mesh for terrain).

Normals are provided. These artifacts only occur, if I use the CommonSurfaceShader. This behaviour can also be seen, when switching the resolution of the spheres to lower than 1 in the tutorial http://doc.instantreality.org/tutorial/commonsurfaceshader/

Does someone know a work-around?

Regards,
pol3waf
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pol3waf
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« Reply #6 on: November 25, 2012, 11:07:38 pm »

Hello again - this problem is still existent and I don't know how to solve it. Could anyone help me out?

Regards,
pol3waf
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kschwenk
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« Reply #7 on: November 26, 2012, 10:19:15 am »

I'll look into it tomorrow.
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kschwenk
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« Reply #8 on: November 27, 2012, 05:04:43 pm »

Should be fixed in tomorrow's daily build.
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pol3waf
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« Reply #9 on: November 28, 2012, 01:25:50 pm »

Thats great news Smiley Thanks a lot!
Which daily-builds contain the update? Ubuntu, Windows, OSX? 32/64bit?

Regards,
pol3waf
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kschwenk
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« Reply #10 on: November 28, 2012, 06:18:55 pm »

Apparently all ran through, except SUSE 64. So all Ubuntu, Windows, and OSX builds should contain the fix.
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pol3waf
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« Reply #11 on: December 04, 2012, 05:00:39 pm »

Thanks a lot! My results look much better now!
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