How to get a lavalight effect?

Hey guys,

i want to have a lava light in my scene but i dont know how to get the effect inside the lava light like you see on the picture below:

i hope you can help me. it also shall move up and down and change the shapes very smooth.

If you don’t need to get too close to it you might try rendering it out beforehand and using a bilboard, so it would be an animated texture that would turn to face the player. Wouldn’t be super accurate, but might be fine for your purposes.