You will be surprised at how many possibilities in Photoshop the displace effect has. You can:

1. Create abstract background images from any source images with a pleasant color scheme.
2. Transform text and images, add volumetric shades of shadows and highlights.
3. Make flags, liquid art and water surfaces.
4. Experiment with a little avant-garde and recklessness!

Download 3 free displacement maps: http://bndl.cat/Free-Liquid

Buy this set in which there are 20 premium displacement maps 6000x4000 px 300 dpi, as well as a Template with smart layers, in which the effect of a volumetric shadow and a layer with the effect of 3D light and shadow are preset. Just replace the content of the layer with your design and choose one of the appropriate displacement maps.