When an image has a distinct texture or pattern, cleaning up blemishes or the like can be a bit trickier, as you need to replicate the texture and/or pattern accurately in order to create a convincing replacement. One such example is pristine sand that has been walked upon, and this excellent video tutorial will show you how to make it perfect again using Photoshop.
Coming to you from Aaron Nace with Phlearn, this fantastic video tutorial will show you how to remove footprints in sand using Photoshop. If you have worked a lot in Photoshop, you will have probably noticed that automated tools like the Spot Healing Brush generally work perfectly well for something like a pimple. However, if you are working on something with regular or directional texture, such as a shirt, the automated tools might be able to replicate the texture, but not in a way that aligns properly with the structure at large, making the edit look artificial and obvious. It takes a bit more work to create a believable edit in these situations, but the effort is well worth the results you will get. Check out the video above for the full rundown from Nace.