There are a bunch of example materials, both metal/rough and spec/gloss, included with the calibration scene.
I had that same problem. Tried other assets and they’re importing fine so it’s just that. On Windows 7, beta18.
Downloading the zip and making a new proj for it is fine though.
There are currently two versions of this on the asset store, 1.2b and 1.2c. The b version is in “Unity Essentials/Sample Projects” and c version is in “Complete Projects”. I couldn’t decompress the b version but the c version seems to be working. Maybe remove the b version?
Well spotted! We recently shifted the official Unity projects over to a new category on the Asset Store but it appears to have caused some problems when we update them. The Complete Projects version is the one to use for now, whilst we work out what’s broken with the new categories.
Asset Store doesn`t proper update this pack. Everytime i start Unity it goes back to version 1.1 .