Nice idea ziggie ... you know you can make a really wet effect... change the footprints above to negative and use as specular map on a plane, it is the best effect when you render animation and change the light, the footprints will shine. you can also use a reflect node on a plane and plug in the footprints as low value bumps... it will looks like somebody was walking on the mirror .. I made this one a time ago in test animations :)

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