But I'm not sure I buy the rest of the arguments, i.e. should be clearly visible from space, should not be light/shadow assisted etc.

不过对于其他的论点我可不买账，比如说要在太空中清晰的看到长城，或者不能用光影效果辅助等。

youdao

Here, visible distance is about 50 game units, so Shadow distance was set to 50 in Quality Settings.

在这里，可视距离大约是50游戏单位，阴影距离可以在质量设置中设置。

youdao

A unique feature can be found in the glass atrium roof that incorporates solar cells which are, if the sun shines, visible throughout the atrium as shadow patterns.

中庭的玻璃屋顶结合了太阳能电池，呈现出独特的特点，如果有阳光，整个中庭中都可见到投射下的阴影图案。

youdao

On the day I was there, he was grousing loudly about a barely visible shadow that he detected on a publicity photo of one of his watches.

FORBES: Big Time

The partial eclipse shadow is to become visible in Brazil, spread over much of the Atlantic and cover much of Africa, as far north as the central Saharan desert.

CNN: Africa awaits total eclipse of the sun