He drew him to the fire and by its light pointed them out.

巴克被他拉到火边, 借着火光指点着那些伤口。

The key idea is that this super complicated volumetric explosion data can be reimagined as a large batch of point light sources.

核心思路在于，这个超级复杂的体积爆炸数据可以作为大批点光源来重新构想。

Most of these scenes are rendered using hundreds of thousands of these point light sources, and as you can see, the results are unbelievable.

这些场景的渲染大都使用了数以十万计的点光源，而正如你所看到的，结果令人难以置信。

When they first moved in the tunnels were really quite old at that point, light levels were low and a colony of bats had moved in.

当她们第一次在隧道里移动的时候，那时候的隧道已经很老了，光线很暗，一群蝙蝠已经搬进来了。

If we solve this light transport problem between these point light sources, we get a solution that is remarkably similar to the original solution with path tracing, however, solving this new representation is much simpler.

如果我们解决这些点光源之间的光传输问题，我们就能得到一个方案，它与原来路径跟踪的方法非常相似，然而解决这个新的课题却要简单得多。