# Glyph filter, random scale value

**URL:** https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452
**Category:** ParaView Support
**Tags:** vtk
**Created:** [April 10, 2025, 3:12am UTC](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452 "2025-04-10T03:12:50Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![mehrpay](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/ec9cab/32.png) [@mehrpay](https://discourse.paraview.org/u/mehrpay)
#### Post date: [April 10, 2025, 3:12am UTC](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452/1 "2025-04-10T03:12:50Z")

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When using Paraview Glyph filter, the scale factor seems to be a random value.  
I think the rational default value would be 1. (e.g., when visualizing particles based on their associated diameter data), so I wonder if this is a bug.  
Is there a concept behind Glyph filter scale factor and can it be set somewhere so I don’t have to change it manually when working with a large volume of VTK files to be postprocessed?  
 ![image](https://discourse.paraview.org/uploads/default/original/3X/e/d/edc955b7eaf55de0826891a2972fcb33bbdb2fb9.png)

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 10, 2025, 7:28am UTC](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452/2 "2025-04-10T07:28:12Z")

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The default is based on a bounds demain:

```auto
        <BoundsDomain mode="scaled_extent" name="bounds" scale_factor="0.1">
          <RequiredProperties>
            <Property function="Input" name="Input" />
          </RequiredProperties>
        </BoundsDomain>

```

I agree that it may not always work, its better than a flat 1. though.

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<div class="post-metadata">

### Author: ![mehrpay](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/ec9cab/32.png) [@mehrpay](https://discourse.paraview.org/u/mehrpay)
#### Post date: [April 11, 2025, 7:29am UTC](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452/3 "2025-04-11T07:29:07Z")

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Thanks Mathieu,

There is no way to override the scale factor directly in a VTK file, right?

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<div class="post-metadata">

### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 11, 2025, 7:33am UTC](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452/4 "2025-04-11T07:33:29Z")

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Definitely not, but you can change the default behavior using a simple XML plugin if you want, or with user settings if you are using the developement version of ParaView.