Eyeon:Manual/Fusion 6/Fog 3D
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The Fog 3D tool applies depth cue based fog to the scene. It is the 3D version of the Fog tool in the Deep Pixel category. It is designed to work completely in 3D space and takes full advantage of antialiasing and depth of field effects during rendering.
The Fog 3D tool essentially re-textures the geometry in the scene by applying a color correction based on the objects distance from the camera. An optional Density Texture image can be used to apply variation to the correction.
Controls
- Fog3D.SceneInput
- [ orange, required ] This input expects a 3D scene.
- Fog3D.DensityTexture
- [ green, optional ] This input expects a 2D image. The color of the fog created by this tool is multiplied by the pixels in the image. When creating the image for the Density Texture keep in mind that the texture is effectively projected onto the scene from the camera.
Controls
Use this checkbox to enable or disable the tool.
By default the fog created by this tool is only visible when the scene is viewed using a Camera tool. When this checkbox is enabled, the fog becomes visible in the scene from all points of view.
This control can be used to set the color of the fog. The color is also multiplied by the DensityTexture image, if one has been provided.
By default the fog is done based upon the perpendicular distance to a plane (parallel with the near plane) passing through the eye point. When the radial option is checked the radial distance to the eye point is used instead of the perpendicular distance. The problem with perpendicular distance fog is that when you move the camera about, as objects on the left or right side of the frustum move into the center they become less fogged even though they remain the same distance from the eye. Radial fog fixes this. Sometimes radial fog is not desirable. For example if you are fogging an object that is close to the camera like an image plane the center of the image plane could be unfogged while the edges could be fully fogged.
This control is used to determine the type of falloff applied to the fog.
- Linear
- Defines a linear falloff for the fog.
- Exp
- Creates an exponential nonlinear falloff.
- Exp2
- Creates an stronger exponential falloff.
This control expresses the range of the fog in the scene as units of distance from the camera. The Near distance determines where the fog starts, while the Far Distance sets the point where the fog has its maximum effect. Fog is cumulative, so the further an object is from the camera the thicker the fog should appear.
Tips for Fog 3D (edit)
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