The iron lattice structure now has 4 glass panels in the floor of the first level.

第一级的地面铁晶格结构现在有4个玻璃嵌板。

He did it by putting a glass panel in front of the camera and painting black marks over specific sections to block the light.

他通过在相机前放置一块玻璃面板并在特定部分涂上黑色标记来阻挡光线来做到这一点。