File 
Invert 
Invert 
Invert 
Invert (SIMatrix3) 
Invert (SIMatrix4) 
Invert (SIQuaternion) 
Invert (SIRotation) 
Invert.html 
Inverting Polygons and Polygon Meshes 
InvertInPlace (SIMatrix3) 
InvertInPlace (SIMatrix4) 
InvertInPlace (SIQuaternion) 
InvertInPlace (SIRotation) 
InvertPolygon 
invertpolygonop.html 
InvertSelection 
invsrf.html 
Iris Wipe 
Is64BitOS (XSIUtils) 
IsA (CollectionItem) 
IsA (ProjectItem) 
IsActive (ClipEffect) 
IsAlwaysComplete (Cluster) * 
IsAnimated 
IsAnimated (Parameter) 
IsAnimated (ProjectItem) 
IsAnimated2 (ProjectItem) 
IsApplicable 
IsApplicable (Filter) 
IsBoundary (ControlPoint) * 
IsBoundary (Edge) * 
IsBoundary (Vertex) * 
IsCellSelected (GridWidget) 
IsClassOf (SIObject) * 
IsColumnSelected (GridWidget) 
IsConnected (Channel) 
IsConnected (FxOperator) 
IsConnected (Operator) * 
IsConnected (Port) 
IsConnectionFlagSupported (FxOperator) 
IsEditing (FCurve) 
IsEmpty (UserDataBlob) * 
IsEmpty (UserDataItem) * 
IsEmpty (UserDataMap) * 
IsEqualTo (SIObject) * 
IsFileSystemCaseSensitive (XSIUtils) 
IsHard (Edge) * 
IsHardArray (EdgeCollection) * 
IsInputConnection (FxOperator) 
IsKindOf (ProjectItem) 
Island Heal UVW Operator Property Editor 
IslandHealUVW 
IslandHealUVWOp 
islhealuvw.html 
IsLinuxOS (XSIUtils) 
IsLocked (Parameter) * 
IsLocked (ProjectItem) * 
IsMaskConnection (FxOperator) 
IsMember (Group) 
IsNodeAnimated (X3DObject) 
IsNotLogged (Command) 
IsolateAll 
IsolatedCorrect.html 
IsolateSelected 
IsOptional (PortGroup) 
IsPoseEffectActive (ClipEffect) 
IsResolved (Material) 
IsRowSelected (GridWidget) 
IsScriptingLanguageInstalled (XSIUtils) 
IsSelected (ProjectItem) * 
Issues in Batch Scripting 
Issues with Python 
IsSupportedInstanceValue (Parameter) 
IsWindowsOS (XSIUtils) 
Item (ActionDeltaCollection) * 
Item (ActionDeltaItemCollection) * 
Item (ActionSourceCollection) * 
Item (AnimationSourceItemCollection) * 
Item (ArgumentCollection) * 
Item (ChainBoneCollection) *