There are occasionally more obvious tells as well, if you look closely. Some examples that I saw:

- A boat cast a shadow, but the mooring rope didn't

- A bench leg was out of perspective, and didn't touch the ground

- In a pile of logs,the ends were sharpened in an unnatural way[0]

- In several there seems to be an inconsistent contrast between something that looks more dirty, worn, weathered, etc. while the surroundings are more clean and smooth.

Some also feel off in a way that I can't really articulate.

[0]: I think the relationship to the prompt was interesting here, the prompt actually asked for a stack of wooden fence posts, but they were really thick for fence posts, and looked more like firewood with a sharpened point. Interestingly, the prompt included the phrase "without excessive sharpening" which I think meant increasing the sharpness of the image, but I wonder if the AI interpreted as referring to the sharpness of the fence posts.