So they're really not bouncing back any light.

所以它们真的不会反射任何光。

Rough surfaces bounce back light at all different angles.

粗糙的表面会以各种不同的角度反射光线。

The size of the hole, how the moon and solar eclipses looked, how lenses and mirrors bent and bounced light.

洞的大小，月亮和日食的样子，透镜和镜子如何弯曲和反射光线。

Any smooth surface that can bounce back light, can be used as a mirror.

任何可以反射光线的光滑表面都可以用作镜子。

Droege positions them in a special white box that bounces the light, leaving no shadows.

多格将它们放置在一个反射光线, 不留阴影的特殊白盒子当中。

The computer also must determine how many times to let the light bounce, which adds significantly to render time as well.

计算机还必须决定让光线反射多少次，这也大大地增加了渲染的时间。

The important thing to remember is that, aside from potential bounced light, there are no separate levels of shadow.

需要记住的重要一点是，除了潜在的反射光之外，不存在单独的阴影级别。

Clouds are one of those things: white clouds bounce white light back up into space.

云就是其中之一：白云将白光反射回太空。

When they’re lit from above, 3D objects look palest on top, since more light bounces off and into our eyes.

当它们从上方被照亮时，3D 物体在顶部看起来最苍白，因为更多的光会反射并进入我们的眼睛。

So I just follow anywhere that the light hits and just kind of accentuate so that the light bounces off of those.

所以我只是跟着光线照射到的任何地方，然后稍微强调一下，这样光线就会从这些光线上反射出来。

In people with blue eyes, those scattered pigment particles bounce blue light back out of the iris due to the Tyndall effect, and the iris absorbs the red light.

有着蓝色眼睛的人由于丁达尔效应，他们的色素粒子把虹膜里的蓝色光线弹开，并且虹膜吸收红色光线。

The purpose of bouncing the secondary rays  around and sending out shadow rays at each point is to find different paths where  light bounces off different surfaces and indirectly illuminates the original point  where the primary ray hits.

使次级射线四处反射并在每个点发出阴影射线的目的是找到光线从不同表面反射的不同路径，并间接照亮主射线击中的原始点。