I have an animated fire "burning" on a round plane by using the fire and smoke features on Blender. It's very similar to the one found in this link. I want to render the model on three.js. I tried the Blend4Web HTML format and only the texture of the fire doesn't appear. I also, exported it to .json and collada with the three.js exporter. No results.

Do I use UV mapping? But the flame isn't a defined model.