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<p>本文以理解VAE,CVAE为基础，拓展至贝叶斯推断
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<p>在现实生活中，光来自各个方向，要么直接来自光源，要么间接地在环境中的物体反弹后，在此过程中被部分吸收。
在某种程度上，物体周围的整个环境都可以看作是一个光源。
图像，尤其是立方体贴图，是编码这种“环境光”的好方法。
这称为基于图像的照明 (IBL)，有时也称为间接照明。
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<p>球谐函数是定义在球面上的特殊函数，其组成了一个正交函数的完备集合（正交基）。在CG里，基本上只要需要间接光照（AO，GI，PRT），就会用到球谐函数编码。
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<p>材质模型在数学上由BSDF描述，BSDF主要由BRDF(Reflectance)和BTDF(Transmittance)组成。仅为Filament的文档笔记
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<p>重要性采样作为渲染的核心技术，无论是离线还是实时中都有大量应用，是所有光照学习的基础。
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<a class="post-title-link" href="/2021/10/27/What-is-an-RKHS-2/" itemprop="url">What is an RKHS [2]</a></h1>
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