In this video I am showing how to denoise a volumetric mesh, while using an older version of Blender. Now some people might wonder why we should care about older versions of Blender and the main reason is for the unfortunate Windows XP users. The reason I call them unfortunate is because they could easily switch to Ubuntu or Fedora while running Wine, but I know a lot of people are hooked on Windows. Older versions of Blender are also needed for old graphics cards that do not support OpenGL 2.0. Below is a link to the .blend file that I used to do this video and it contains the Pass Combine Denoiser with my edits in it for volumetrics.