This script is the script version of the Update animation (keyed transforms) Import option in the FBX Import options topic, which lets you import FBX files so that existing un-keyed transforms are not overwritten, and are instead preserved in their current state.
// Necessary for prompt mode or in cases where plug-in isn't loaded and the commands below are required // loadPlugin "fbxmaya" // Change the import mode to exclusively merge keyed transforms only // FBXImportMode -v exmergekeyedxforms; // Perform the import operation // FBXImport -f $fileName -importFormat "fbx";