I can confirm. This works for me every single time.

Hi everyone,

I’ve recently been exploring ways to leverage GPT’s powerful image generation capabilities to produce transparent-background assets for my project. I’ve built a dedicated skill that integrates multiple image processing algorithms and run several rounds of tests—the results have turned out really well.

If you’re interested, feel free to check it out on GitHub and test it out directly within Codex!

Github repo：MangoWAY/generate-transparent-image