[vtkusers] [vtk-developers] QVTKOpenGLWidget + SSAA pass breaks depth peeling

[Simon Esneault]

Hello VTK community

Is seems adding an SSAA rendering pass breaks the depth peeling process.
Attached is an example that highlight the problem. When commenting out the
line 64 (l_renderer->SetPass( l_ssaa ); the translucent geometry is
rendered correctly, but the result is not anti-aliased.

With SSAA pass -> Depth Peeling broken :
https://cdn.pbrd.co/images/H7qnZxC.png
Without SSAA pass -> Depth Peeling ok :
https://cdn.pbrd.co/images/H7qnvE9.png

Shall I fill a bug for this ?

Thanks

-- 
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Simon Esneault
Rennes, France
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cmake_minimum_required( VERSION 3.5 )
PROJECT( QtVtkSsaa )
set( CMAKE_AUTOMOC ON )
find_package( Qt5Widgets REQUIRED QUIET )
find_package( OpenGL REQUIRED )
find_package( VTK REQUIRED )
include( ${VTK_USE_FILE} )
add_executable( QtVtkSsaa MACOSX_BUNDLE main.cpp )
qt5_use_modules( QtVtkSsaa Core Gui )
target_link_libraries( QtVtkSsaa ${VTK_LIBRARIES} ${OPENGL_LIBRARIES} )
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