Same thing happened with me. There was a pile of old weathered fencing in our back yard for 3 or 4 months that I "saw" a photograph there. I tried different lighting, night flash etc. I even tried different format 35mm, 120 (6x4.5 & 6x6) After several times with everything I had I was not happy with the outcome. Fortunately for me it was removed.
I printed a few that were better and sepia toned a few and it only turned out to be that it was only old lumber I was looking at. "Nothing here folks just move along". Another photography lesson.