The negative space adds to the subject of the boot tips. Called Points of View, we see immediately that there is more than one view, one way of looking at things. The faint lines in the white floorboards seem to agree with the one point of view. However, the one more forward takes the lead.
I shot with a speed of 1/40 and aperture of f/2.8. Once on my computer I brought this image into photoshop to add a texture layer but chose one that would not make the negative space disappear in clutter. Layers can add but they also can detract or distract from what the photographer is trying to say.