# Colored coincident surface display problem

**URL:** https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924
**Category:** Support
**Created:** [August 6, 2020, 11:19am UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924 "2020-08-06T11:19:33Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![Cheng1087](https://discourse.vtk.org/user_avatar/discourse.vtk.org/cheng1087/32/1197_2.png) [@Cheng1087](https://discourse.vtk.org/u/Cheng1087)
#### Post date: [August 6, 2020, 11:19am UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924/1 "2020-08-06T11:19:33Z")

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As shown in the figure, the three colored surfaces partially overlap. It appears weird.  
How can i avoid this?  
 ![coincideFace](https://discourse.vtk.org/uploads/default/original/2X/0/035895b3d32bf91617400641f22e7c3213480fe7.png)

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [August 6, 2020, 4:19pm UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924/2 "2020-08-06T16:19:57Z")

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This may help: [http://vtk.1045678.n5.nabble.com/Coincident-topology-questions-td5746090.html](http://vtk.1045678.n5.nabble.com/Coincident-topology-questions-td5746090.html)

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### Author: ![a772485252](https://discourse.vtk.org/user_avatar/discourse.vtk.org/a772485252/32/5327_2.png) [@a772485252](https://discourse.vtk.org/u/a772485252)
#### Post date: [August 30, 2022, 2:05am UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924/3 "2022-08-30T02:05:05Z")

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Hello,Andras lasso.This link seems to have failed.

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [August 30, 2022, 3:22am UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924/4 "2022-08-30T03:22:23Z")

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The archive on nabble seems to be gone, but you can use this page instead: [[vtkusers] Coincident topology questions](https://vtkusers.public.kitware.narkive.com/vZVbBddo/coincident-topology-questions)

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### Author: ![a772485252](https://discourse.vtk.org/user_avatar/discourse.vtk.org/a772485252/32/5327_2.png) [@a772485252](https://discourse.vtk.org/u/a772485252)
#### Post date: [August 30, 2022, 6:14am UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924/5 "2022-08-30T06:14:08Z")

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Hello,Andras lasso.Is there a similar package in VTK? Just like the content in the link.[OpenGL Tessellation](http://www.songho.ca/opengl/gl_tessellation.html)

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [August 30, 2022, 11:37am UTC](https://discourse.vtk.org/t/colored-coincident-surface-display-problem/3924/6 "2022-08-30T11:37:51Z")

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Check out [vrkTriangleFilter](https://vtk.org/doc/nightly/html/classvtkTriangleFilter.html), it probably does what you need.