Mesh with weird inverted light direction Sometimes while editing meshes I get stuck with a weird kind of behaviour. I know mostly it happens due to my fault as a newby, but I need find the way to fix it.

Step by step explanation appreciated.



https://www.sendspace.com/file/7pyhz1
The obj file has bad normal data for some reason, which gets imported into Blender. The way to fix it is to delete any custom normal data using the 'Clear Custom Split Normal' button from the object data panel.