First, that is just a SketchUp image export. The style, as was mentioned, is a basic grey background. See here:
[image: unsD_01.JPG]
A couple of things to take note while exporting images. If you export with screen resolution (view size) your lines will be jaggy and gross. Like this:
[image: hOZJ_02.jpg]
[image: O0F4_03.jpg]
However, if you export at a higher resolution then reduce the size in Photoshop (or another image editor) you will get a cleaner image:
[image: 4TzJ_04.jpg]
[image: 7d7y_05.jpg]