簡介：

Radiance是美國能源部下屬的勞倫斯伯克利國家實驗室（LBNL）于上世紀90年代初開發的一款優秀的建筑采光和照明模擬軟件包，它采用了蒙特卡洛算法優化的反向光線追蹤引擎。ECOTECT中內\x00了Radiance的輸出和控制功能，這大大拓展了ECOTECT的應用范圍，并且為用戶提供了更多的選擇。Radiance廣泛地應用于建筑采光模擬和分析中，其產生的圖像效果完全可以媲美高級商業渲染軟件，并且比后者更接近真實的物理光環境。

Radiance中提供了包括人眼、云圖和線圖\x00內的高級圖像分析處理功能，它可以從計算圖像中提取相應的信息進行綜合處理。

Radiance建模界面

功能：

Radiance is one of the most powerful daylight and electrical lighting analysis tools available since it can handle virtually any space geometry, as well as non-diffuse reflectances. The Desktop Radiance version provides the opportunity for more lighting professionals to easily access this powerful software tool through a graphical user interface. This document will describe the basic operation of Desktop Radiance 1.0 and provide some simple instructions and tips on how to construct and analyze a room model using this software. As you read through this document, you should refer to the flowchart provided in Appendix B of this document, which provides a general outline of the operations, steps, and possible analysis paths involved in applying this software to the design of daylight and electric lighting systems.

To learn more about the software, the reader should consult the Desktop Radiance User Manual, or its help utility, since it is not possible to discuss all of the relevant features and operations in this document.

Radiance自然采光分析

資源：

• 網站：http://radsite.lbl.gov/radiance/HOME.html
• 下載：http://radsite.lbl.gov/deskrad/download.htm