# (Python) Is there a way to Parallel Render with VTK?
**URL:** https://discourse.vtk.org/t/python-is-there-a-way-to-parallel-render-with-vtk/8460
**Category:** Support
**Created:** [May 10, 2022, 8:36am UTC](https://discourse.vtk.org/t/python-is-there-a-way-to-parallel-render-with-vtk/8460 "2022-05-10T08:36:38Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@joaomlap](https://discourse.vtk.org/u/joaomlap)
#### Post date: [May 10, 2022, 8:36am UTC](https://discourse.vtk.org/t/python-is-there-a-way-to-parallel-render-with-vtk/8460/1 "2022-05-10T08:36:38Z")
I am trying to follow the example showed here: [https://gitlab.kitware.com/vtk/vtk/-/blob/v9.1.0/Examples/ParallelProcessing/Generic/Cxx/TaskParallelism.cxx](https://gitlab.kitware.com/vtk/vtk/-/blob/v9.1.0/Examples/ParallelProcessing/Generic/Cxx/TaskParallelism.cxx)
to allow me to parallel render a vtkMultiBlockDataset, the data is already distributed across multiple nodes and I can open N render windows and interact individually. Now I am looking for a solution to render only one window with all the data from the other nodes. However following this example alone did not work for me. I get an error if I try to do “controller.SetSingleMethod” and if I just let every call the process function in all processes I end up with N empty black windows.
Is it possible to render in parallel in VTK and where can I find documentation to do this?
Thank you.
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### Author:  [@xxyyy159](https://discourse.vtk.org/u/xxyyy159)
#### Post date: [May 12, 2022, 3:29am UTC](https://discourse.vtk.org/t/python-is-there-a-way-to-parallel-render-with-vtk/8460/2 "2022-05-12T03:29:25Z")
> [@joaomlap](#):
>
> ossible to render in parallel in VTK and where can I find documentation to do thi
openGL seems like not allowing multithread in single window.