How can I recreate the filled Ultimate Meter in Overwatch?

Questions & Answers
1

Here is a pic of the effect: Imgur: The magic of the Internet

I think it is really neat effect and being able to make something like it would help me to make better UI for my projects. Is it particles? An Animation? I would like to know.

Thank you in advance for any ideas or suggestions.

2

It looks like a combination of particles and animation. Some light effects, halo, and even a cloud inside. Experiment with different combinations, you may not get the exact result but you might get something better.