May 17, 2011 Patch (Tools)

{{Patch layout
 * game = tools
 * source = http://store.steampowered.com/news/5485/
 * source-title = Portal 2 Authoring Tools Update Released
 * before = May 12, 2011 Patch (Tools)
 * after = May 20, 2011 Patch (Tools)


 * notes =

Portal 2 Authoring Tools

 * Fixed crash that could occur when malformed brushes were saved in a map and then re-opened in Hammer.
 * Hammer will now properly save maps after detecting and fixing malformed brushes. Fixes “Permission Denied” error some users were experiencing.
 * Removed “Lighting Preview” option as this is not currently supported

}}