An enumerated type containing possible duration types to do Raytracer render. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 17.0.0.0 (17.0.1090.0) 
  Since:  2017 
Syntax
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| Visual Basic | 
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| Visual C++ | 
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Members
| Member name | Description | 
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| ByLevel | Render by the defined iterations. | 
| ByTime | Render by the defined time. | 
| UntilSatisfactory | Render until satisfactory. |