I the above pattern, I have pulled the Harlequin Shape in black foreground and white foreground over the checked background. [Please see the following blog post for those instructions: https://jackikellum.wordpress.com/2013/08/03/how-to-create-repeated-pattern-custom-shape-tool-fabric-foil-in-photoshop/]
Initially, the image looked as follows:
After this step, I selected the Harlequin layer and selected Soft Light from the Blending Modes. Please see the following Blog for those instructions: https://jackikellum.wordpress.com/2013/08/03/how-to-create-harlequin-toile-pattern-digital-montage-2-prints-blended-custom-shape-tool-photoshop/
Feel free to email me for further explanation.