In Edit Mode select all of your vertices and Recalculate the Normals. The option is in your Tool Tab in the Shading/UV's tab (Press the "T" key to toggle the Tool Tab on/off).
In Edit Mode select all of your vertices and Recalculate the Normals. The option is in your Tool Tab in the Shading/UV's tab
In Edit Mode select all of your vertices and Recalculate the Normals. The option is in your Tool Tab in the Shading/UV's tab (Press the "T" key to toggle the Tool Tab on/off).