I want to know how to blur the skybox.
We have implemented a Bokeh blur in F3D: https://gitlab.kitware.com/f3d/f3d/-/blob/master/src/vtkF3DRenderPass.cxx#L235
This is a great way to emphasize the dataset and this should be moved to VTK at some point.
I test it, is blur the background, but is too slow.
You can reduce the number of samples.