Durley wrote: ↑Sun Nov 23, 2025 9:44 pmI couldn’t persuade Meshy to create a slate stack that looked realistic so my effort was produced by getting Meshy to create an individual roof slate that I then flipped and mirrored a few times before randomly combing multiple copies into one STL.
The slate pile was an intriguing problem. It revealed some interesting failures with AI, both in Meshy, ChatGPT and Gemini. The systems didn’t seem to understand the geometry at all well despite being given what I’d thought were good photo prompts.
Not liking to be beaten I probably spent a good hour working through various prompts with different photos and edits in Photoshop and Chat GPT to get what I thought was a really good image, but Meshy just couldn’t generate anything from it. A final tweak to background colour made all the difference and it managed to finally deliver an acceptable STL,
on the fourth retry, that could be edited in Blender.

- Slate pile STL.jpg (179.9 KiB) Viewed 75 times
The final pile STL prints nicely and is able to be rescaled to different sizes, chopped down to fit and, rather nicely, can be skewed to look like a stack of slate awaiting loading.

- Slate piles.jpg (290.06 KiB) Viewed 75 times
It’s even possible to cut an individual slate from the pile.