I applied my grid to a vibrant photograph that I found of a lake as I wanted the photo to represent 'reflection' as what people do when viewing photographs. The plants have connotations of life, and the stone wall 'longevity', all properties that people want in a photo/photo frame.
I added an adjustment layer to the photo to create an offset triangle in the top left, against suggesting reflecting by imitating glass. I used white and back because of it's high tonal contrast making it stand out and easily readable.