# Stream Tracer from vtk
**URL:** https://discourse.paraview.org/t/stream-tracer-from-vtk/13921
**Category:** ParaView Support
**Tags:** vtk
**Created:** [February 13, 2024, 10:09am UTC](https://discourse.paraview.org/t/stream-tracer-from-vtk/13921 "2024-02-13T10:09:21Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@audrey.gno](https://discourse.paraview.org/u/audrey.gno)
#### Post date: [February 13, 2024, 10:09am UTC](https://discourse.paraview.org/t/stream-tracer-from-vtk/13921/1 "2024-02-13T10:09:21Z")
Dear Paraview team,
I run computations with the Telemac-Mascaret solver.
The results are generated in serafin format : so I use a python script provided in the solver package to convert the serafin results in .vtk format and be able to use Paraview.
To date, I can well visualize scalar maps and use Slice, Clip and Contour procedures on any .vtk loaded files. However, I am not able to render streamlines … as the Stream Tracer procedure is not available when .vtk files are loaded.
Please find attached a model of .vtk result I currently use :
[r2d\_vent00000004.vtk](https://discourse.paraview.org/uploads/short-url/y4t0Vs7lLdJZjclmp2hDKfnIuv3.vtk) (481.0 KB)
Regards,
Audrey
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2024, 10:50am UTC](https://discourse.paraview.org/t/stream-tracer-from-vtk/13921/2 "2024-02-13T10:50:45Z")
- run ParaView
- Filters → Calculators → `"VELOCITY_U ______M/S_____________"*iHat+"VELOCITY_V ______M/S_____________"*jHat`, Apply
- Filters → StreamTracer → Check Surface Streamline → Apply
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### Author:  [@audrey.gno](https://discourse.paraview.org/u/audrey.gno)
#### Post date: [February 13, 2024, 11:17am UTC](https://discourse.paraview.org/t/stream-tracer-from-vtk/13921/3 "2024-02-13T11:17:31Z")
Dear Mathieu,
I am so happy … it works perfectly both in 2D and 3D !
Thank you so much !
Audrey