# Sliced visualisation, shows the results is on surface but inside the model is empty
**URL:** https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751
**Category:** ParaView Support
**Created:** [January 20, 2024, 6:41pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751 "2024-01-20T18:41:01Z")
**Posts on this page:** 15
**Page:** 1
### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 20, 2024, 6:41pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/1 "2024-01-20T18:41:01Z")
i had point cloud data, i had a mesh, i used volume point interpolated to apply csv point data to mesh but when i clip the mesh, the result is on surface but on the inside there is nothing. No data points or any of the mesh.
Pic of what i see
pic of what i want to see with solid shape
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### Author:  [@FEngineer](https://discourse.paraview.org/u/FEngineer)
#### Post date: [January 22, 2024, 7:23am UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/2 "2024-01-22T07:23:23Z")
> [@H\_G](#):
>
> i had a mesh
Wasn’t it a surface mesh (like STL) ?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 22, 2024, 8:18am UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/3 "2024-01-22T08:18:21Z")
a .vtp file is a surface, you want to save as a .vtu.
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 22, 2024, 7:32pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/4 "2024-01-22T19:32:49Z")
it was but i also want to see the inside. how can i do this? thanks
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 22, 2024, 7:33pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/5 "2024-01-22T19:33:51Z")
> [@mwestphal](#):
>
> want to save as
that is just to show the image. even before that it has same issue
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 23, 2024, 8:24am UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/6 "2024-01-23T08:24:35Z")
> [@H\_G](#):
>
> that is just to show the image. even before that it has same issue
In the second screenshot, it is clearly not a surface.
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### Author:  [@FEngineer](https://discourse.paraview.org/u/FEngineer)
#### Post date: [January 23, 2024, 4:59pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/7 "2024-01-23T16:59:28Z")
You need a volume mesh to map the results. It can have some dummy results so that you can import it easily.
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 27, 2024, 6:09am UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/8 "2024-01-27T06:09:53Z")
that’s just the point clouds before being processed. that’s what i’m trying to use to make the model
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 27, 2024, 6:10am UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/9 "2024-01-27T06:10:34Z")
can you explain a little further, please? i’m new to this
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 29, 2024, 8:13am UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/10 "2024-01-29T08:13:01Z")
> being processed
Well, how do you process it ?
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### Author:  [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [January 29, 2024, 1:07pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/11 "2024-01-29T13:07:00Z")
As others have said, whatever you have in `Finished_state_0.vtp` is no use to you. That is a polygon file (i.e. only surfaces). That is why ParaView is only showing surfaces. All that is in your file is surfaces. You never said how this file was made, but however it was made it does not make what you want.
When you have a cloud of points, such as when you load a csv file and use `Table To Points`, there are a couple of standard ways to make volume data out of that. If your data set is small, `Delaunay 3D` usually gives good results. For larger data or other cases where Delaunay does not work, the `Point Volume Interpolator` is an easy way to interpolate points into a uniform grid.
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 29, 2024, 3:17pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/12 "2024-01-29T15:17:56Z")
> [@Kenneth\_Moreland](#):
>
> your file is surfaces. You never said how this file was made, but however it was made it does not m
volume interpolation. it looks like that when i cut through it
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [January 29, 2024, 3:19pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/13 "2024-01-29T15:19:41Z")
the vtp is just to show, even when it’s just been made, that the problem exists. I used delaney 3d and it works ok-ish i think but the thing is the structure is like fuel rods, cladding and the fuel assembly. with delaney 3d everything is seen as one box
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### Author:  [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [January 29, 2024, 7:08pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/14 "2024-01-29T19:08:00Z")
Well, I can see from your second image that the points are formed in a box, so that is what Delaunay gives you. If you want to see inside the box, you can use the `Volume` representation to turn parts transparent. You can also use something like the `Threshold` filter to remove the parts that are not the parts you want to see or `Contour` to find the boundaries between the parts.
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### Author:  [@H\_G](https://discourse.paraview.org/u/H_G)
#### Post date: [February 3, 2024, 3:30pm UTC](https://discourse.paraview.org/t/sliced-visualisation-shows-the-results-is-on-surface-but-inside-the-model-is-empty/13751/15 "2024-02-03T15:30:01Z")
> [@Kenneth\_Moreland](#):
>
> `Threshold` filter to remove the parts that are not the parts you want to see or `Contour`
thanks thanks