Nice that you have installed Creature a personal sleeping/bathing and more unit. Is there a drinking unit nearby, like in most Cat rooms?
You have an artist's eyes for this stuff, Barbara. Interesting images.
On a side-note, and you may know this already, however, in my work, I have found about a cup or so of bleach in a gallon of water, put in a pump up garden sprayer, and applied to any mold/algae/etc. growth on the sides of homes or other areas eliminates/kills the stuff if left on for 30 min. to an hour. Do not scrub it with a brush or broom, let it set, and rinse in an hour, with garden hose. Repeat if necessary. Work from the bottom up, so no streaking will occur. This will not harm vinyl siding or paint, or masonry. Test on any bare wood, Cedar, etc. first. Cover any foliage you want to keep with cheap plastic drop cloths. Sorry, couldn't help myself.
Not that there is anything wrong with the patina of mold/algae/etc. on whatever. LOL
I like your snotty Cat.