1) what do you mean by an opaque object? 2) How can you define a transparent object? 3) How does a shadow form? 4) when can you see an object? 5) What happens to the size of shadow as the object is moved closer to light source?

RELATIONSHIP BETWEEN LIGHT SOURCE,OBJECT AND SHADOW

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?