在2D实拍视频中合成3D动画
发表时间：2005-10-264. Lights!.
4. 灯光！
Once you're sure you have your camera matched, freeze it in MAX to avoid accidentally shifting it whilst you continue to work on the scene.
一旦你对齐了摄像机，在MAX中锁定它，以避免在下面的工作中不小心被移动。
Now you can refer to all those lighting notes you took on set. I tend to use a little cheat and place some white ping pong balls in the scene and shoot a few frames, then when i come back to the computer, i can create some balls in MAX and get the lighting and positioning to match perfectly.
现在你可以参考在实拍时的灯光纪录。我喜欢在实拍中加入几帧乒乓球的画面，在MAX中我创建一样的球体一保持光照和位置吻合。
Again this will take time, lighting is an art form. It's important not to rush this stage as the quality of the lighting will decide whether or not an effects shot works.
这也需要时间，打光是一门艺术。这一步一定不能着急，因为打光的品质将决定最终效果的质量。
Play close attention to shadows and the color of the light in the scene, also be aware that unlike in computer animation, light in the real world bounces around, so if an object is placed on a white surface light will bounce from the white surface onto the underside of the object. You will have to try to simulate all this with your computer lighting, which can be a very hard task.
注意场景中的阴影和光的颜色，注意，与电脑动画不同的是，显示中的光线会被四处反弹，所以当一个物体在被放置在白色表面上将把白色应在物体的底部。你必须努力用电脑中的光模拟这一切。这将会是项艰巨的工作。
The best advice to matching lighting is good observation and note taking during the shoot.
吻合光照的最佳建议是仔细观察和在拍摄时纪录笔记。
5. Anchoring your images using shadow.
5. 用阴影描绘图像
There are many visual clues our eyes need to understand the relationship between objects in an image, but one of the most important is shadows. Shadows help us understand where the light is coming from, how many light sources there are and the intensity of each.
我们的眼睛需要许多视觉线索来判断一张画中物体的关系，其中最重要的是阴影。阴影帮我们理解光从哪里来，有多少个光源和每个光源的强度。
In this example the intensity and blur of shadows will be achieved in post production so I've used ray traced shadows to give me perfect black shadows with a hard outline.
在这个示例中阴影的强度和模糊度将在后期处理中完成，所以我是用光线跟踪类型的阴影来产生完美的黑色硬边阴影。
Assuming your lights are set up correctly your shadows should work without much alteration, we simply have to place proxy objects in our scene to receive the shadows. Proxy objects will be placed wherever there is an object in our shot that will receive a shadow from our CG object. If you look at the example below you can see that I've had to recreate the CPU, the desk, the wall and the cup to receive shadows from my car.
为保证灯的位置正确设置，阴影不应有太大的改动，我们必须在场景中创建虚拟物体来接受阴影。在实拍中有实际物体的地方都应放置相应的虚拟物体来接收CG物体产生的阴影。从下图中可以看出我创建了主机、桌子、墙壁和杯子来接收小车产生的。
评论加载中…
- The Making of the Cactus Scene2005-10-26
- 卡通场景的制作2005-10-26
- 在Cult3D中实现碰撞检测2005-06-30
- 绸子在片头中的运用2005-06-30
- psd+ill美女鼠绘教程2005-06-30
