非常好棒的质感！
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From what I remember I made the dithered texture effect in GIMP simply by using G'MIC filter called Transfer Colors [Reduced Colors]. It allows choosing a palette and offers various dithering options. I might have also used app.dithermark.com, I definitely experimented with that too. (And for programming I used heaps.io engine but I cannot recommend it due to some issues I had with it when exporting to various systems.)