# 世界¶

The world buttons let you set up the shading of your scene in general. It can provide ambient color, and special effects such as mist, but a very common use of a World is to shade a background color. These are accessible via the World tab. The world environment can emit light, ranging from a single solid color, physical sky model, to arbitrary textures.

The World 数据块菜单.

## 面¶

面板: 世界环境 ‣ 面

## 体积¶

面板: 面板： 世界环境 ‣ 体积

## 环境光遮蔽¶

面板: 世界环境 ‣ 环境光遮罩

Ambient occlusion is a lighting method based on how much a point on a surface is occluded by nearby surfaces. It simulates soft global illumination shadows by faking darkness perceived in corners and at mesh intersections, creases, and cracks, where ambient light is occluded, or blocked. This is a trick that is not physically accurate, but it is useful to emphasize the shapes of surfaces, or as a cheap way to get an effect that looks a bit like indirect lighting.

AO照明方式仅适用于漫反射类BSDF、光泽或透射类BSDF将不受影响。表明的透明度将会一并计算，例如，一个透明度减半的表面，其遮蔽效果强度将会相应减半。

## 雾场通过¶

面板: 世界环境 ‣ 雾场通过

Mist can greatly enhance the illusion of depth in your rendering. To create mist, Blender makes objects farther away more transparent (decreasing their Alpha value) so that they mix more of the background color with the object color. With Mist enabled the further the object is away from the camera the less its alpha value will be.

The distance from the camera at which the mist starts to fade in.

The distance from Start of the mist, that it fades in over. Objects further from the camera than Start + Depth are completely hidden by the mist.

The curve function that controls the rate of change of the mist's strength further and further into the distance.

Tip

Tip

Because Mist works by adjusting transparency, this can sometimes cause objects to be partially transparent when they should not be. One workaround is to set the Mist settings as desired, but turn Mist off. The Mist data is still available for compositing even though it is off. Use Compositing to feed the Mist pass to the Alpha Over node to blend the background color (or a render layer with just the sky) with the rendered image. This produces the mist effect but since Mist is off the object transparency (or lack of) is preserved.

## 设置¶

面板: 世界环境 ‣ 设置

### 面¶

 多重重要性采样关闭。 多重重要性采样开启。

## 射线可见性¶

面板: 世界环境 ‣ 射线可见性