M3.1 Flash builds a single-file Three.js koi pond with feeding behavior
A Three.js koi pond test in one HTML file worked end to end: patterned fish, flowing water, camera controls, and fish that actually turn toward food, with the author praising speed and cost for iterative coding.
I gave MiniMax M3.1 Flash a pretty specific Three.js challenge: build a living koi pond in a single HTML file. I wanted moving koi with different patterns, flowing water, rocks, plants, camera controls, and a feed button where the fish actually swim toward the food. It got the whole thing working. What stood out was the behavior. The fish didn’t just keep looping the same animation. They reacted when food appeared and changed direction toward it. That made this a much better test than just asking for a nice-looking 3D scene. For me, this is where M3.1 Flash gets interesting: it’s fast, capable enough to handle real interaction logic, and much more cost-efficient for the kind of iterative coding work where you’re going back and forth a lot.