The percentage (0..100) of surface transparency 0 means the surfaces are opaque, 100 means they are fully transparent

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since: 2015

Syntax

C#
`public int Transparency { get; set; }`

Visual Basic
`Public Property Transparency As Integer Get Set`

Visual C++
`public: property int Transparency { int get (); void set (int value); }`

Exceptions

Exception	Condition
Autodesk.Revit.ExceptionsArgumentOutOfRangeException	When setting this property: The value is invalid. The valid range is 0 through 100