Updated : 2021
How to use the Displace filter and displacement maps in Photoshop tutorial.
You can use PSD files as displacement maps. Access the displacement map PSD files via the filter menu and distort and displace.
To use displacement maps, goto the Filter menu
Distort category
Displace filter
Stretch to fit
Repeat
Scale
OK
Select a file to use in Photoshop PSD format in the displace filter
The displacement maps are standard PSD files. They can be made from anything, images, type etc but you can also use displacement maps via patterns or textures.
You can find ourdisplacement maps (all in PSD format) on this site for all kinds of work such as create awesome linear effects, scratching, text effects and more.
If the file is in PNG format, you can simply open the PNG file and then save it as a PSD file. It should be noted that Affinity Photo requires PNG format so the conversion is in reverse The key thing about the displacement map is that is PSD and it is loaded via the displace filter found in the distort menu of Photoshop and it can be used once or multiple times.
Open image
Filter menu
Distort
Displace
Horizontal scale
Vertical scale
Displacement map stretch or tile
Undefined area such as wrap or repeat.
OK
Select the file to use for the displacement map
OK
The displace filter is one of those tools that probably works best when applied multiple times. One application of the displacement maps and displace filter can look a little limited, apply it again and the magic really happens and even better, apply the magic with the displace filter combined with other filters such as noise or oil paint and you will see the tool in many new ways. You can also combine the displacement maps with other resources as well (they are not cast in stone) such as adding addition artworks to the design (perhaps intermixed with effects) such as brush strokes
Open image
filter menu
distort / displace filter
Set scale, stretch etc and select a displacement map
apply
filter menu
distort / displace filter
Set a different scale, stretch etc from the first time
select a different displacement maps for the displace (or the same one)
OK
repeat as required
As with many filters, I find that the filters work best with a layer so before you use the filter, simply duplicate the current layer via the layer menu. Apply the displace filter to that layer and then use the layer menu and the blending modes to blend with the original image such as select blending mode of darken
open image
layer menu
duplicate layer (perhaps more than once if you want multiple layers to blend)
filter menu
distort category / displace
set scale etc
select displacement map
apply effect
go to the layer menu and set blending mode to darken etc
repeat with other layers if available
A key thing for me is that the displace filter can be used with Photoshop smart objects and that means instead of just applying the effect and that is that, you can use it but at the same time you can decide that you don't want it or try different settings and so on. It is a pity that you can't select the displace entry and duplicate and duplicate (so adding 10 or so filter entries), you have to manually create them
Select a layer
Layer and smart objects
Convert (to smart object)
Apply displace filter
Apply another displace filter and so on
Add adjustments to smart objects
You can also combine multiple smart filters with the smart object and also combine those effects with adjustments and layer effects to create a truly awesome effect. You can also bundle the whole thing up in a new smart object and save the result to the CC libraries.
You can also combine the displacement maps for use with the Photoshop displace filter with patterns but central to the whole thing is the PSD file (unless Adobe change their mind with the filter and allow for multiple other sources such as ones from CC libraries and PNG files as well).
The displace filter can be used with color channels, separate color channels.
Channels panel
Select red channel
Filter and distort and displace filter
Settings and select file
Select green channel
Different settings and different file if you wish
Blue channel etc
You can create some very interesting colorful effects with the channels and the displacement maps
You can also open the displacement maps PSD files and apply other effects to them such as blurs etc. If you want to avoid the seams then use masks / selections etc to control the effect on the edge. Or perhaps use brushes on the displacement map and only modify the center of the work. Another option is to use the edit menu and define pattern. You can then re-size the document, perhaps make it 10 times bigger and then fill that new document with patterns and they will still be seamless. You can then save that new file as a PSD file and use that with the displace filter. All the PSD files on this site are grayscale, you can always manipulate the image with the full RGB and then use that in the displace filter for additional features (for another tutorial)
Open PSD file
Edit menu
Define pattern
Layer menu in Photoshop
New fill layer
Pattern
Select pattern
Scale to 25%
Flatten
Filter menu
Twirl (or another filter)
File menu
Save as PSD