Version: 2020.1
Experimental: this API is experimental and might be changed or removed in the future.


class in UnityEditor.Experimental.AssetImporters

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Class attribute used to register a custom asset importer derived from ScriptedImporter with Unity's Asset import pipeline.

using UnityEngine;
using UnityEditor.Experimental.AssetImporters;

[ScriptedImporter(version: 1, ext: "sphere", AllowCaching = true)] public class SphereImporter : ScriptedImporter { public override void OnImportAsset(AssetImportContext ctx) { // ... } }


AllowCachingEnable cache server uploads and downloads.
AutoSelectDetermines whether the importer gets automatically selected for the specified extension(s).
fileExtensionsList of file extensions, without leading period character, that the scripted importer handles.
importQueuePriorityGives control over ordering of asset import based on types. Positive values delay the processing of source asset files while Negative values place them earlier in the import process.
versionImporter version number that is used by the import layer to detect new version of the importer and trigger re-imports when such events occur, to apply latest changes made to the scripted imrpoter.


ScriptedImporterAttributeUse the ScriptedImporter attribute to register a custom importer derived from ScriptedImporter with Unity's Asset import pipeline.It is best practice to always increment a scripted importer's version number whenever the script is changed. This forces assets imported with lower version numbers to be re-imported.If the Unity Editor setting "Auto-Update" is set to enabled, editing a script outside of the editor and saving it will trigger both a re-import of the script and all assets of the corresponding type.