vtkTexturedActor2D's transparent pixel are incorrectly rendered when used with FixedPoint VolumeRendering in the same renderer
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
VTK 6.3/OGL2, Windows/OSX The problem is visible when trying to render a vtkTextActor, or a vtkTexturedButtonRepresentation2D with a png that contain transparent pixels in the same renderer than a vtkFixedPointVolumeRayCastMapper. When using a vtkGPUVolumeRayCastMapper, there is no problem
Attached a very simple example that demonstrate that a vtkTextActor AND a vtkTexturedButtonRepresentation2D are not correctly drawn in that case :
- OpenGL1 backend : http://picpaste.com/pics/OGL1-Texture-okay.1447690100.png
- OpenGL2 backend : http://picpaste.com/pics/OGL2-Texture-not-okay.1447690272.png
The transparent pixels seem transformed to white ...
Let me know if any more information are needed, hope that helps ! Simon