The first method is a quick and easy-to-use approach based on a single material. Of course, a mesh sequence has to be loaded with a “RealFlow Mesh Importer” plugin. We recommend using MD files, because they provide a wide range of channels. With BIN files you are limited to velocity, but weight maps are available.
Create a material, and open the “Color” panel.
There, choose Texture > Colorizer
Click on the black square. In the new dialogue you will find another “Texture” option and a gradient.
Open Texture > Effects, select “Vertex Map”, and click on the white square.
Drag one of the plugin node's vertex map tags (e.g. “Age”) to the empty “Vertex Map” slot.
Change the gradient to your needs.
It seems as if this process did not have any effect at all, but when you render the scene you will see coloured spots. It is very likely that the result does not meet your expectations, because it lacks contrast. To fix this, proceed as described here:
Open the plugin's “Vertex” (only available with MD files) panel.
Look for the channel you have used in the white material, e.g. “Age”.
Increase or decrease the channel's “Scale” parameter to ration between blue and white areas until you get the desired result.