Prompting Challenge: AI struggles with simple repeating shapes

negadecimal · reddit · 2026-08-25

The author shares a prompting challenge: getting major image models to generate a precise line drawing of 7 equilateral triangles joined in a ring to form a heptagon. Despite theoretical simplicity, results were poor (14-sided shapes, non-equilateral triangles, squares). The author invites others to try their luck, suspecting the issue lies in prompting.

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