This "outdoor still life" was pretty carefully composed. I used a Canon 17 mm TS-E lens so that I could shift it down to devote most of the image space to the terrazzo floor while keeping the camera level for true verticals. I also tilted the lens downward to make the plane of focus parallel to the floor.
After all the detail work, I thought that the image could use the balancing influence of sprezzatura. Pardon the fancy buzzword, but it seems just right: some appearance of carelessness was needed, but without interfering with any of the geometric accuracy. And as for calling it sprezzatura, well, we've already got some chiaroscuro going here, so...
Only a very small proportion of my photos go through Adobe Photoshop®, but this one cried out for special treatment. I made two copy layers above the original. The middle layer was posterized to four levels. The top layer was converted to a Threshold mask, set slightly above mid tone level. Mode for that layer was set to multiply. Then the opacity of the two new layers was adjusted until I got this result:
The posterization brought out little specks of disorder among the water drops and emphasized the irregular edges of the tiles. Just enough! It also led to the three major color bands on the floor, which added leading lines to the composition. Entropy and order.
With everything balanced just right, it looks as if there is a line separating the reality of the outside world from the psychedelic fantasy of the mysterious porch. As for the shell, I don't know what it means. It's just there. My eyes tend to move between the shell and the bench, with the shell the main subject...but I still can't say that it has any symbolism. I'd be happy to see your ideas in the comments below.