Add Asset.GetUnrecognizedReferencePaths() - returns a list of paths this asset references that can not be resolved (missing from disk) Missing asset resolver when loading Hammer maps If your map contains missing assets when you load your map (after EditorReferences have been resolved), we will check if there are matching assets on asset.party and prompt the user to install them. We don't have to worry about updating EditorReferences here either, as this is automatically done on save if any asset refs have a linked package. After the assets are installed the user will be prompted to reload the map - this is needed to reload the missing assets. https://files.facepunch.com/matt/1b1811b1/image%20%281%29.png