Made by: Nick
In this tutorial I'll show how to give a plain flag the effect of motion (moving in the wind), here I'll use this Red rectangle as my flag
First Make a new layer
then select the Gradient tool
and use White-Black gradient with Reflected Mode as shown in the image below
Now make a small rectangular selection, That is taller than the flag in height, but smaller than it's half its width
and fill it using the gradient tool
again make another selection beside the last one, and fill it
keep doing this in random width of each selection
Now save the file as PSD file (the gradients layer should be the only visible layer when you save the file). This is so you can re-use the same pattern for other flags whenever you want to repeat this.
after saving the file, make the gradients layer invisible
and then for the flag layer, Apply this filter (Distort > Displace)
Use these values and Click OK!
now you will be asked for a file, use the one we have just saved
and Finally, make the gradients layer visible again, but change its mode to Overlay
This final result would probably look much better if it were a real flag i'd used at the start...but the same process applies to creating it.