The light probe is, in the simplest terms, a photograph of your environment. they work in very much the same way that reflection maps do, and are made the same way.
::简单来说,光探测器是环境的照片. 它们的操作与反射地图的操作方式非常相似,

Equipment:
::设备:

  1. A pure silver ball. Try a plastic Christmas tree ball ornament.
    ::试试一个塑料圣诞树球装饰品.
  2. A camera, preferably digital. If you have a high-end digital camera, you'll have less work ahead.
    ::摄像机,最好是数字摄像机.
  3. A place you'd like to capture the lighting from. Try laying different things in your environment to get a good idea.
    ::试着在环境中放置不同的东西,
  4. Something to fire the shutter without touching the camera. For digital cameras, Paul Debevec recommends using a program that will take all the pictures for you.
    ::对于数码相机,Paul Debevec建议使用一个程序来为您拍摄所有照片.
  5. A tripod.
    ::一个三脚架.

Set it up like so. Remember that the height of your camera and the height of the ball relative to each other controls the angle at which the horizon will be shot. In other words, shoot the ball at the same angle that you plan to shoot your 3D scene in. If your scene is animated... consider making a similar rig except attaching your reflective ball to a video camera as was done for  Flight of the Navigator .
::设置它这样. 记住相对相机的高度和球的高度控制着地平线的角度. 换句话说,把球拍摄在你计划拍摄3D场景的角度. 如果你的场景是动画的...考虑做一个类似的装置,除了把你的反射球连接到视频摄像头上,就像在"航海员之飞"中所做的那样.

(note from a VFX pro who is using this technique for years: on a mirror ball everything is reflected except the area right behind the sphere opposite to the camera - where the tape is on the above picture)
::镜子球上一切都会反射, 除了相机对面的球体后面的区域,

The process:
::过程:

  1. Set up your rig and take a series of images with varying exposure times.
    ::设置你的设备, 拍摄一系列图像,
  2. Taking 2 sets of pictures, each offset by 90 degrees, will enable you to get better coverage of the background and eliminate the reflection of the camera taking the picture.
    ::拍摄两组照片, 每组相片偏移90度,

Last modified: Monday, 17 March 2025, 3:04 PM