Apply transparency to a single color (when loading X3D files)


here’s what I’m trying to do: I exported paraview results as X3D files. The blue color is supposed to be transparent, but it looks like X3D did not handle that so that when I load the file into blender and uses the “vertex color paint” option I still have the blue.

What I want is to apply an alpha filter to this color, so I only get the red part of the results. I’m pretty sure there is something to be done using material/texture properties, but after messing a bit with the different properties I can’t get anything close to what I want.

Any ideas on how to make that ?

attached, the paraview results i want to treat. What i want in blender is pretty much what i get on the second pic.

thanks !