Depth Peeling slow on vtk 9 (vtk <= 8 is fast)
With vtk 9 depth peeling has become very slow. For example vtk 8.1.2 (and earlier) has 5 to 10 times higher fps (frames per second). It seems that the max number of peels is always fully used ...
Try the attachted file with python3 with vtk 8 and vtk 9: depth_peel_test.py
- vtk 8.1.2: while rotating the scene, fps >> 100 up
- vtk 9.0.1: fps barely above 20