Zooming backgrounds compliment other art pieces very well. Many use a similar method for desktop wallpapers and such. This tutorial covers how to make a zoom effect.
First Open a document and fill it with a dark color. Go to FILTER>>RENDER>>DIFFERENCE CLOUDS.
Now go to FILTER>>SKETCH>>CHROME. 10 Detail and 0 Smoothness.
Next, go to IMAGE>>ADJUSTMENTS>>LEVELS. Move the tabs near the black spikes.
You should have something brighter.
Now apply a radial blur by going to FILTER>>BLUR>>RADIAL BLUR. Set the amount to 80, Method to ZOOM and Quality to Best.
Finally go to IMAGE>>ADJUSTMENTS>>LEVELS again and move the white tab toward the center a little bit to make it slightly brighter. Make a new layer and fill it with the color you want your zoom to be. Set the blend mode to color and you're done.
Final Result