Liquid metal effect

[empty___space]

How can I make the same effect as the attached picture?

[S_Gans]

Take a look at this tutorial: https://www.youtube.com/watch?v=LbeLJJvtiHg

This uses an image, but you can make your own, with a black/white gradient, then running Filter>Render Clouds, then Filter>Render Difference Clouds. Then liquify. Just as an example.