体积的物体

Volumetric objects are used to simulate different kinds of volumes depending on their materials:Volumetric objects用于模拟不同类型的体量，具体取决于它们的材质:

• Visible light volumes (they are not light sources, therefore, they don't illuminate the scene):可见光体积(它们不是光源，因此不会照亮场景):

  • Spheres of light around omnidirectional light sources Spheres
  • Beams from directional light sources 光束来自方向光源
  • Light volumes around flat light emitters Light volumes周围的平光发射器
  • Sun beams falling into a room through openings 太阳光束从开口进入房间
• Fog that obscures objects inside its volume Fog使其卷内的对象模糊不清
• Clouds or shaped fog 云或形状的雾

There are four possible shapes for volumetric objects:体积对象有四种可能的形状:

• Box
• Sphere
• Omni
• Proj (Projected)

To create various effects described above, you need to assign them different materials. Some materials can be assigned only to one type of volumetric objects.要创建上面描述的各种效果，您需要为它们分配不同的材料。某些材料只能分配给一种类型的体积对象。

Volumetric lights, fog and shafts体积灯，雾和轴

• volume_cloud_base material volume_cloud_base材料
• volume_fog_base material volume_fog_base材料
• volume_light_base material volume_light_base材料
• volume_omni_base material volume_omni_base材料
• volume_proj_base material volume_proj_base材料
• volume_shaft_base material volume_shaft_base材料