# Drawing grain boundaries

**URL:** https://discourse.paraview.org/t/drawing-grain-boundaries/10017
**Category:** ParaView Support
**Created:** [July 16, 2022, 4:19am UTC](https://discourse.paraview.org/t/drawing-grain-boundaries/10017 "2022-07-16T04:19:50Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![rnp](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rnp/32/8781_2.png) [@rnp](https://discourse.paraview.org/u/rnp)
#### Post date: [July 19, 2022, 7:14pm UTC](https://discourse.paraview.org/t/drawing-grain-boundaries/10017/5 "2022-07-19T19:14:43Z")

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Hello @jfausty ,

Thank you for your detailed response. I use deal.ii and generate \*pvtu/\*vtu files from that. I don’t think I can shift to an structured grid as in some time steps I will have huge distortions. Below is the initial grid:

 ![c.0000](https://discourse.paraview.org/uploads/default/original/2X/5/5ddf7f0bce780e3aa268678d027a1b6e99df6e7e.jpeg)  
The final grid looks like this:  
 ![c.0074](https://discourse.paraview.org/uploads/default/original/2X/d/db1878a0cd09ea6777a72ab1c5797cd9fbd5c6b1.jpeg)

Is there no way of applying contour filters on the \*pvtu file? I use large number of processes and view these files using paraview from a remote cluster. Merging them into a single file makes it too cumbersome to work with.

Also, I tired using merge blocks filter as mentioned [here](https://discourse.paraview.org/t/contour-array-is-null/8855), but the filter is unavailable.

Do you have any other suggestions on this?

Thanks again,  
Raghunandan.

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