VTK 9.0 Offscreen Rendering

Hello,

I’m seeing a significant slowdown when rending offscreen with VTK 9.0:

ren_win.SetOffScreenRendering(1)

The rendered image looks better than the ones from <VTK9.0, however for testing purposes the renders are taking a long time. As I’m currently using the default parameters for the render window, are there any non-default parameters to speed up the render?

Thanks for all your hard work!

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