BoxGizmo lets you create a box-shaped gizmo in your scene. Clicking the BoxGizmo button displays the Box Gizmo Parameters rollout.
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Create panel > 
(Helpers) > Atmospheric Apparatus > BoxGizmo button
Box gizmo with volume fog
Procedures
To create the BoxGizmo:
- Drag in a viewport to define the initial length and width, then release the mouse and drag vertically to set the initial height.
- Click to end BoxGizmo creation.
To add a new atmosphere:
- Select the apparatus gizmo.
- On the
Modify panel 
Atmospheres & Effects rollout, click Add. This displays the Add Atmosphere dialog. - Choose an atmosphere from the list.
- Click OK.
This associates a new atmosphere with the apparatus.
To add an existing atmosphere:
- Select the apparatus gizmo.
- On the Modify panel Atmospheres & Effects rollout, click Add. This displays the Add Atmosphere dialog.
- In the dialog, choose Existing.
- Choose an atmosphere from the list.
- Click OK.
This creates a duplicate atmosphere for the apparatus. Its settings are initially identical to the atmosphere you chose. You can adjust them using Setup.
Interface
Name and Color rollout
The Name and Color rollout lets you rename objects and change their wireframe color.
Box Gizmo Parameters rollout
- Length, Width, and Height
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Set the dimensions of the box gizmo.
- Seed
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Sets a base value used to generate the atmospheric effect. Each apparatus in the scene should have a different seed. If more than one apparatus uses the same seed and same atmospheric effect, they will produce nearly identical results.
- New Seed
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Click to generate a random number automatically and place it in the seed field.
Atmospheres & Effects rollout
The Atmospheres & Effects rollout, available from the Modify panel, allows you to add and set up atmospheres directly to the gizmo.
- Add
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Displays the Add Atmosphere dialog from which you can add an atmosphere to the BoxGizmo.
- Delete
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Deletes a highlighted atmospheric effect.
- Setup
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Displays the Environment panel, where you can edit the highlighted effect.