Make sure you set the intensity a bit lower then the front omni though, since that will be our primary light source!
确保你设置的强度低于在正前方灯的强度，因为那是我们场景的主光源。
Surface omni - as this source illuminates the surface we put a usual shadow map in Shadows bookmark, so as the shadow from the bump on those planet areas where it will take place is not so sharp.
表面泛光灯——作为星球表面的照明光源，我使用普通的阴影贴图，这样由行星凹凸不平的表面导致的阴影就不会那么锐利。
But if the goal is to reproduce sounds accurately, then a speaker must be either an acoustic point source (monopole, omni-directional) or an acoustically small bi-directional source (dipole).
但是，如果目标是精确的重放声音的话，一个扬声器必须是声学上的点声源(单极点，全向响应)，或者是一个声学上小的双向源(偶极)。
So, for this we will just use 2 omni lights as light source.
所以，因为这点我选择用两个点光源做光源。
So, for this we will just use 2 omni lights as light source.
所以，因为这点我选择用两个点光源做光源。
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