# prolongation filter

**URL:** https://discourse.paraview.org/t/prolongation-filter/12822
**Category:** ParaView Support
**Created:** [September 6, 2023, 11:34am UTC](https://discourse.paraview.org/t/prolongation-filter/12822 "2023-09-06T11:34:35Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Rahi](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rahi/32/10279_2.png) [@Rahi](https://discourse.paraview.org/u/Rahi)
#### Post date: [September 6, 2023, 11:34am UTC](https://discourse.paraview.org/t/prolongation-filter/12822/1 "2023-09-06T11:34:35Z")

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![image](https://discourse.paraview.org/uploads/default/original/2X/6/6f2715a9670bf3e65ee8d59f19d09bd94bde6ee5.png)  
Hello,  
I used “Transform” filter to prolong the bottom of a 3D object in stl format but changes the shape. It stretches the whole object so that the diameter of the inlet and outlet also changes, while I only need to prolong the bottom.  
I appreciate your help.  
Best, Rahi