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光圈越小，焦距越短，距离被摄物体越远，景深就越大。

在处理数码照片时，最普遍的法则是保证高光区曝光准确，低光区随他去

特别是彩色负片的时候，你最好增曝一档

白平衡机构会试图把白色制成纯白色。如果这个最亮的部分是黄色，它会加强蓝色来减少画面中的黄色色彩，以求得更为自然的色彩。

自动白平衡调整功能是现在摄像机都有的功能。摄像机存贮有针对某些通用光源的最佳化设置方案。摄像机可以根据通过其镜头和白平衡感测器的光线情况，自动探测出被摄物体的色温值，以此判断摄像条件。并选择最接近的色调设置，由色温校正电路加以校正，白平衡自动控制电路自动将白平衡调到合适的位置。这一功能被称作为自动白平衡调节。

Photoshop Using a program such as photoshop to do your glows can be a much faster way than doing it from inside 3dsmax, since you never need to rerender your 3d element. The general procedure is as follows... Take your image, duplicate the image as a layer Heighten the contrast and reduce the brightness to get just an image that only represents the bright parts of your image (for my test I changed the brightness to -30 and the contrast to 90) Desaturate the layer (you can experiment with only desaturating it slightly or modifying the hue of this image to achieve colored glows) Blur it with a "Gaussian Blur" filter (for this test, I used a value of 15) Note: You can also experiment with the "Lens Blur" filter instead of the "Gaussian Blur", which will give you a more defined defocusing effect similar to a Bokeh effect. Then set the mode of the layer to linear dodge (this is an additive blend, see my Photoshop Tips lesson for more discussion on linear dodge and it's relation to an additive mode). Now your have a glow layer sitting on top of your original image. Playing with the layer's Opacity controls how much of the glow is mixed with the original image. Here's what the layers look like for this effect... And here's an experiment with adding color to the blurred layer...

第五、锻炼你的视觉透视感，