I am using this package : ParaView-5.9.1-1476-gf2172c1-osmesa-MPI-Linux-Python3.9-x86_64 downloaded from Paraview page. I am using Ubuntu 20 desktop with no GPU. And I am doing volume rendering. For your question " If you want Remote rendering , you need to try the proper example such as py-web-vue/examples/02_contour/vtk-remote-rendering", I tried it but in browser I cannot rotate the object like I did in “02_contour/pv-toggle-rendering” . Since I am new to this VTK/ Parview, applogize me for such silly questions, but my main objective is : server is responsible for 3D rendering, client is just display 2D images. And client is able to rotate object, cut object … (somehow it visualize like Overview | itk-vtk-viewer, but this itk-vtk js is client side (which handles all task: volume rendering, rotate, cut …))