It's getting much harder to tell, for me it's like somebody put the smoothness on max, like it's too polished.

For me it's a bit too perfect. A human could definitely have achieved the same result, but I'm not sure someone who would spend this much time perfecting an image like that would add the glow on the floor that seemingly comes from nowhere with no purpose.

I agree with you, detecting AI slop is becoming extremely hard for me. Sometimes, like in this example, you can ask for what purpose something was done. Why is the underglow in there, and where does the light come from? A human staring at this image for at least a handful of hours would have made decisions about it, someone generating the image wouldn't really think about it and just go "eh looks cool".

Implausible design/architecture and scale. I don’t believe anyone would go in so much lengths to build this so cleanly in this style just for few likes on a shitpost (although, I admit some people are crazy committed) Prompting an AI is easier and cheaper. So, most likely AI slop.

Slop always kinda has an uncanny look to it to me

For me it’s because it looks too much like a headphone. If you look at the seat, it basically has the headphone controls on it which makes no sense.

If a human was to make this, it would be a toilet that looks like a bose headphone. But instead it looks like headphone components morphed into a toilet.

I wasn't sure, so I checked the comments. My suspicions where raised because it seemed like a lot of image editing effort for the joke and also the glass looked wrong-ish.