# Opacity issue with point picking on surface

**URL:** https://discourse.vtk.org/t/opacity-issue-with-point-picking-on-surface/1193
**Category:** Support
**Created:** [June 21, 2019, 7:52pm UTC](https://discourse.vtk.org/t/opacity-issue-with-point-picking-on-surface/1193 "2019-06-21T19:52:43Z")
**Posts on this page:** 1
**Showing post:** 14

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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: [July 3, 2019, 3:19pm UTC](https://discourse.vtk.org/t/opacity-issue-with-point-picking-on-surface/1193/14 "2019-07-03T15:19:43Z")

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The input mesh resolution is not affected by triangulation. Only cells may be split and so their IDs may change. If you triangulate right after you create the mesh then you don’t need to deal with ID changes later on.

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_[View the full topic](https://discourse.vtk.org/t/opacity-issue-with-point-picking-on-surface/1193)._