adobe photoshop - Triangle Pattern Background

I'm using Adobe Photoshop CC. I have a background that I want to convert it into a triangle shaped pattern for example, check the tiles on this picture

I have found a tutorial on how to do it but did not get it right, see this

This is what I've made, as you can see.. pattern is not clear. How do I make the pattern clear like in the first picture.

Answer

1. Make a background:

2. 
   

   Duplicate twice and rasterize if necessary

   
   


3. 
   

   On top layer, Transform Horizontal Skew 45° (Ctrl+T). Then Filter > Pixelate > Mosaic. Then Transform Horizontal Skew -45° effectively putting it back in original position.

   
   


4. 
   

   On middle layer same thing but do -45° then Mosaic then +45°

   
   



5. 
   

   Lower opacity of both layers to 50% and then move them to a position you like: