# vtkOpenGLHardwareSelect error when picking in combination with vtkSSAOPass

**URL:** https://discourse.vtk.org/t/vtkopenglhardwareselect-error-when-picking-in-combination-with-vtkssaopass/3350
**Category:** Support
**Created:** [May 20, 2020, 1:32pm UTC](https://discourse.vtk.org/t/vtkopenglhardwareselect-error-when-picking-in-combination-with-vtkssaopass/3350 "2020-05-20T13:32:05Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![rdbrn](https://discourse.vtk.org/user_avatar/discourse.vtk.org/rdbrn/32/5627_2.png) [@rdbrn](https://discourse.vtk.org/u/rdbrn)
#### Post date: [May 20, 2020, 1:32pm UTC](https://discourse.vtk.org/t/vtkopenglhardwareselect-error-when-picking-in-combination-with-vtkssaopass/3350/1 "2020-05-20T13:32:05Z")

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I’m getting the following error:  
vtkOpenGLHardwareSelect:199 ERR| vtkOpenGLHardwareSelector (0000020C7F641B90): Too many props. Currently only 16777214 props are supported.

when picking a point using vtkPropPicker in a renderer where I’ve added a vtkSSAOPass.

 ![afbeelding](https://discourse.vtk.org/uploads/default/original/2X/0/0dd1422cbe5c250447250037edffad46b4388f2a.png)

I can reproduce it on my machine with the following python script:  
[vtk9\_sod\_saoo.py](https://discourse.vtk.org/uploads/short-url/9gq6Fc84oFs4Q23IeEZf3y7T9ZG.py) (1.4 KB)

this is the basic cube example with a few lines added.

OS: Windows 10  
vtk: 9.0.0 installation from pypi (via pip)  
python 3.7 (64 bit)

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### Author: ![panicbuttonvfx](https://discourse.vtk.org/user_avatar/discourse.vtk.org/panicbuttonvfx/32/1838_2.png) [@panicbuttonvfx](https://discourse.vtk.org/u/panicbuttonvfx)
#### Post date: [July 18, 2020, 3:22am UTC](https://discourse.vtk.org/t/vtkopenglhardwareselect-error-when-picking-in-combination-with-vtkssaopass/3350/2 "2020-07-18T03:22:50Z")

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I was going to report the same issue and found this thread. Any ideas on why this happens? Thanks!

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### Author: ![Michael](https://discourse.vtk.org/user_avatar/discourse.vtk.org/michael/32/16_2.png) [@Michael](https://discourse.vtk.org/u/Michael)
#### Post date: [July 20, 2020, 9:30am UTC](https://discourse.vtk.org/t/vtkopenglhardwareselect-error-when-picking-in-combination-with-vtkssaopass/3350/3 "2020-07-20T09:30:34Z")

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Do you have the same issue with other render passes?

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<div class="post-metadata">

### Author: ![Michael](https://discourse.vtk.org/user_avatar/discourse.vtk.org/michael/32/16_2.png) [@Michael](https://discourse.vtk.org/u/Michael)
#### Post date: [July 20, 2020, 12:02pm UTC](https://discourse.vtk.org/t/vtkopenglhardwareselect-error-when-picking-in-combination-with-vtkssaopass/3350/4 "2020-07-20T12:02:15Z")

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Fixed by [https://gitlab.kitware.com/vtk/vtk/-/merge\_requests/7118](https://gitlab.kitware.com/vtk/vtk/-/merge_requests/7118)  
It will be available in VTK 9.1