[vtkusers] Rendering bugs with translucent geometry in VTK 7.1

[Kevin GAUDET]

Hi,

I currently upgraded my project from VTK 7.0 to VTK 7.1.
However I'm currently having some rendering issues especially with 
transparent geometry.
It seems that there are some bug with dual depth peeling because I don't 
have those issues when setting the VTK_USE_LEGACY_DEPTH_PEELING 
environment variable.

I've already reported two issues :

https://gitlab.kitware.com/vtk/vtk/issues/17051

https://gitlab.kitware.com/vtk/vtk/issues/17042


Both issues contain simple code samples that trigger the bugs.

Cheers,
Kevin.