vtk-8.1 has GPU memory leak? esp. on Linux. the related class are vtkRenderWindow，vtkXOpenGLRenderWindow
VTK 8.1 is end-of-life; is there a problem with a more recent VTK release (such as 9.3)?
Cc: @sankhesh
Try the latest version of VTK. If the leak still exists, please provide details about your application e.g. mapper, dataset type, graphics driver, etc. and also how you’re detecting the GPU memory leak.