Amazfit Watch faces

Hi, How many images are optimal for sunrise and sunset.Trex3 SashaCX75 editor.

I guess for every zepp device works the same, in the editor you can set how many images you wanna use (I have choosen to use 11 for a watchface for the bip 6) but to prevent any empty/blank space (especially in the hours post sunset until sunrise) you gotta use another image (maybe using icon or just in the actual background) to keep the space showing something at any moment

After sunset, I have solved it with a static background with the phases of the moon when the daytime layers disappear. It's more that the more images there are, the more accurately the sunrise begins. Sunset cuts off the system.