It is very similar to photon mapping, but without many of its limitations.

它和光子贴图很相近，但是少了很多限制。

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This article presents a two-pass algorithm to render the scene including participating media, and this algorithm is an expansion of the rendering to solid objects with photon mapping.

本文依据光子映射对实体物体的渲染，将其扩展到对包含参与介质的场景的渲染，为此提出了一个两路的渲染算法。

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PERISCOPE is an instrument and mission concept with the goal of investigating and mapping lunar skylights from an orbiting platform using photon time-of-flight imaging.

PERISCOPE是一个仪器和任务概念，从一个轨道平台，使用光量子飞行时间成像法，（达到）调查和测绘月球天窗目的。

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PERISCOPE is an instrument and mission concept with the goal of investigating and mapping lunar skylights from an orbiting platform using photon time-of-flight imaging.

PERISCOPE是一个仪器和任务概念，从一个轨道平台，使用光量子飞行时间成像法，（达到）调查和测绘月球天窗目的。

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