许多年过去现在你们已经发现我们如在天空光那样。
为了产生蓝色的日光，我使用了金属射线日光系统和天空光。
To get the blue daylight, I used the Mental Ray day light System and a Sky light Portal.
主要介绍太阳光和天空光的建模方法和现有的一些室外绘制的工作。
Mainly introduce the modeling methods of sunlight and skylight and current works on outdoor scene rendering.
首先使用上述图像分解模型，将图像表示成太阳光和天空光基图像的线性组合。
The model representing an outdoor image as a linear combination of sun basis image and sky basis image is first adopted.
此方法在渲染过程中除了考虑太阳光和天空光的照射，还考虑了物体间的能量传递，可以表现出物体间相互反射的效果。
The algorithm simulates the effects of not only the illumination of sunlight and skylight, but also the energy exchange among scene objects to have inter-reflection.
然后，通过对太阳光基图像的特点进行分析，将太阳光和天空光入射光强的求解归结为一个可实时求解的能量最小化问题。
Exploiting the characteristics of the sun basis image, the computation of sunlight and skylight of every frames is finally reduced to a minimization problem which can be solved in real time.
然后，通过对太阳光基图像的特点进行分析，将太阳光和天空光入射光强的求解归结为一个可实时求解的能量最小化问题。
Exploiting the characteristics of the sun basis image, the computation of sunlight and skylight of every frames is finally reduced to a minimization problem which can be solved in real time.
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