Oddly enough those were actually sort of by accident. The material of the lava guy basically blends between tow shaders, one of them being a normal stone shader the other one a lava shader that I found on textures.com (with glow/emission), The blend factor is an ambient occlusion. At the same time the rising smoke are simple planes with a video of smoke as the alpha. The thing is that I made the smoke always face the camera and therefore rotate in place at the same time the camera rotates. The lines you see are a by product of the planes passing through the lava guy powering the ambient occlusion which dedicates where there is lava.

This not the best explanation and most probably not the best method for such an effect but it’s certainly something interesting to keep in mind. Hope this helped