Portal 1 and Portal 2... Problem in time is a mod for portal. And of course, there is a big problem in time!
This will fix the patch that Valve made. Hammer has no grid? models gone black?! this tutorial is to help you fix that.
Posted by kaipol on Oct 17th, 2011
Here's what you do. First thing, go to Folder Options, this can be done by searching it on your Start Button, if Mac, you might not have to do this part. Press the VIEW tab then uncheck Hide extensions for known file types. Apply then go to c:\Program Files (x86)\Steam\steamapps\'''username'''\sourcesdk\bin\orangebox\bin - Go to the folder called, dxsupport.cfg, if you don't have one create one and leave it empty, if you do, delete all the content inside of it. YOU CANNOT DELETE THE FILE ITSELF. Open up Hammer and you should be done! note - Transparent Textures will look a bit funny in Hammer , but will be fine in game.