How to create seamless texture in Photoshop

Repeating textures could never create realistic render. This obvious tiling is cause by textures that are not seamless. So the question is how to create seamless texture.

Here is how its done in Photoshop

Step 1: Load the texture

Step 2: Go to Filter and click other. Select Offset in the options.

Step 3: Adjust horizontal and vertical offset until you see the noticeable seam.
Notice by doing this. The edges of original texture both vertically and horizontally were shifted. 

Step 4: Use Patch tool. 

Select the seamed area and drag it to another area. 

Step 5: Use Clone stamp tool.

You can also use the clone stamp tool by taking some sample and stamping in on the areas you need to correct.

Thats it!

Below shows the corrected texture. The obvious seam was corrected.

Below shows the effect of the seamless texture

Download the materials I did.

Diffuse map

Bonus. I also did some displacement and bump map.

Displacement/bump map

Specular map.