QT5.8 VTK7.1 MacOS VolumeGPURender QVTKWidget2 OpenGL2
we are experiencing the following problems with the above mentioned combo, On various HW: MacBook Pro 2011,2014,2015 MacBook Air etc. the default GPURenderMode in vtkSmartMapper will issue several 'framebuffer has an attachment error' in the console and not draw anything. but this happens only in Release compiles, not in Debug compiles using Xcode 8.2.1 to regenerate the effect: use GPURenderDemo.cxx, but use a vtkRenderWindow created by QVTKWidget2 instead of the default vtkRenderWindow compile in Release -> no Volume Rendering, only a white background, if one instantiates a QPainter Object in the overloaded Frame method of the widget.GPURenderDemo-BugExposure.cpp