インポートしようとしているAssetImporterを参照します
#pragma strict
// Set the scale of all the imported models to "globalScaleModifier"
// and dont generate materials for the imported objects
class CustomImportSettings extends AssetPostprocessor {
var globalScaleModifier : float = 0.0028f;
function OnPreprocessModel() {
var importer : ModelImporter = assetImporter as ModelImporter;
importer.globalScale = globalScaleModifier;
importer.importMaterials = false;
}
}