# Avoid merging duplicated points
**URL:** https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905
**Category:** ParaView Support
**Created:** [September 21, 2023, 4:20pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905 "2023-09-21T16:20:26Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@sebasgut1](https://discourse.paraview.org/u/sebasgut1)
#### Post date: [September 21, 2023, 4:20pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/1 "2023-09-21T16:20:26Z")
Hello,
I am trying to upload a STL file that has plenty of points and most of them are duplicated. I noticed that it takes too long to upload it, but if I try to visualize it in Microsoft 3D Viewer, it takes only a few seconds. Maybe it takes that long because of the merging. Is there a way to upload a STL file without merging the duplicated points?
Thank you
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### Author:  [@danlipsa](https://discourse.paraview.org/u/danlipsa)
#### Post date: [September 21, 2023, 7:56pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/2 "2023-09-21T19:56:02Z")
Is setting
DuplicatePointsForFaceTexture
to False making a difference?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 22, 2023, 7:02am UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/3 "2023-09-22T07:02:46Z")
@sebasgut1 please share your dataset.
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### Author:  [@sebasgut1](https://discourse.paraview.org/u/sebasgut1)
#### Post date: [September 22, 2023, 1:15pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/4 "2023-09-22T13:15:12Z")
STLReader does not have that setting
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### Author:  [@sebasgut1](https://discourse.paraview.org/u/sebasgut1)
#### Post date: [September 22, 2023, 1:19pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/5 "2023-09-22T13:19:46Z")
I was not able to upload through this uploader, so here a link to the [stl file](https://we.tl/t-qIN6Gs1Z3c)
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [September 22, 2023, 1:40pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/6 "2023-09-22T13:40:41Z")
The reader itself has the [flag](https://vtk.org/doc/nightly/html/classvtkSTLReader.html#a37bb358f1a0be79218f9162cd8fea529).
You just need an XML plugin to expose it I guess.
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### Author:  [@sebasgut1](https://discourse.paraview.org/u/sebasgut1)
#### Post date: [September 22, 2023, 2:59pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/7 "2023-09-22T14:59:08Z")
Is there a way to do it in pvpython with paraview?
I was trying to do it with STLReader from Paraview, but does not work. With vtkSTLReader works but then the reader cannot be shown in paraview.simple.Show()
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### Author:  [@danlipsa](https://discourse.paraview.org/u/danlipsa)
#### Post date: [September 22, 2023, 4:22pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/8 "2023-09-22T16:22:49Z")
Indeed, that is for PLY, Sorry for the confusion.
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [September 22, 2023, 5:04pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/9 "2023-09-22T17:04:00Z")
Yes, create a plugin (1 xml file) like [here](https://github.com/Kitware/ParaView/blob/master/Examples/Plugins/ReaderXMLOnly/Plugin/ReaderXMLOnly.xml) where you expose that extra property and then load that file as plugin.
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### Author:  [@sebasgut1](https://discourse.paraview.org/u/sebasgut1)
#### Post date: [September 25, 2023, 3:18pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/10 "2023-09-25T15:18:45Z")
[stlreader.xml](https://discourse.paraview.org/uploads/short-url/gTYcIv9f0ZyVOvaBkcY85cebIm4.xml) (948 Bytes)
Like this?
But is this only for GUI? Because I have a script. Since importing vtk in pvtyhon and using vtkSTLReader.MergingOff() works, is there a way to transform the polydata in way that paraview.simple.Show() understands? Because the other option is to change the whole script that has paraview.simple to vtk, but I prefer not to.
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### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [September 25, 2023, 11:24pm UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/11 "2023-09-25T23:24:06Z")
More like
```xml
```
And then do the following in a script
```python
import time
from pathlib import Path
from paraview import simple
t0 = time.time()
plugin_path = str(Path( __file__ ).with_name("plugin.xml").absolute())
file_path = str(Path( __file__ ).with_name("heatsink.stl").absolute())
simple.LoadPlugin(plugin_path, ns=globals())
reader = MySTLReader(FileName=file_path)
simple.Show(reader)
simple.Render()
t1 = time.time()
print(f"Load + render time {t1 - t0}s")
```
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### Author:  [@sebasgut1](https://discourse.paraview.org/u/sebasgut1)
#### Post date: [September 26, 2023, 8:13am UTC](https://discourse.paraview.org/t/avoid-merging-duplicated-points/12905/12 "2023-09-26T08:13:41Z")
It is faster now, thank you!!!