Another method for creating a seamless texture involves using the Healing Brush and Clone Stamp tools. These tools allow you to sample areas of the image and paint over edges to create a seamless blend. To use these tools, follow these steps:

A perfect seamless texture is a lie. Nature has no tiles. But a convincing seamless texture exploits the brain's limited working memory. By using the Offset filter to isolate the problem, Frequency Separation to protect micro-details, and manual cloning to bridge the gap, you create a loop that the eye cannot detect.

The Art of Creating Seamless Textures with Adobe Photoshop