# OffScreenRenderingOn/Off stops the interactor?

**URL:** https://discourse.vtk.org/t/offscreenrenderingon-off-stops-the-interactor/1862
**Category:** Support
**Created:** [October 4, 2019, 8:44am UTC](https://discourse.vtk.org/t/offscreenrenderingon-off-stops-the-interactor/1862 "2019-10-04T08:44:31Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Mskovmand](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/m/9fc29f/32.png) [@Mskovmand](https://discourse.vtk.org/u/Mskovmand)
#### Post date: [October 4, 2019, 8:44am UTC](https://discourse.vtk.org/t/offscreenrenderingon-off-stops-the-interactor/1862/1 "2019-10-04T08:44:31Z")

</div>

Having trouble implementing OffScreenRendering for when I’m exporting an image of my scene.

What I’m doing:

1. Generate data
2. Enable OffScreenRendering
3. Write image.
4. Enable OnScreenRendering
5. Render the image (to open the render window)
6. Start the interactor (This isn’t working!)

I made a simple script reproducing the issue:

```
import vtk

cylinderSource = vtk.vtkCylinderSource()
cylinderSource.SetCenter(0.0, 0.0, 0.0)
cylinderSource.SetRadius(5.0)
cylinderSource.SetHeight(7.0)
cylinderSource.SetResolution(100)

mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(cylinderSource.GetOutputPort())

actor = vtk.vtkActor()
actor.SetMapper(mapper)

renderer = vtk.vtkRenderer()
renderWindow = vtk.vtkRenderWindow()
renderWindow.AddRenderer(renderer)

renderWindowInteractor = vtk.vtkRenderWindowInteractor()
renderWindowInteractor.SetRenderWindow(renderWindow)

renderWindow.OffScreenRenderingOn()
renderer.AddActor(actor)
renderWindow.Render()

# In my main script, this is where I use an WindowToImageFilter to export a figure.

renderWindow.OffScreenRenderingOff()
renderWindow.Render()
renderWindowInteractor.Initialize()
renderWindowInteractor.Start()

```

On my end, when the render window shows up, the interactor is not responding, the window is “stuck”.  
Is there something I misunderstood or is this simply not possible?