Go to your styles dialog > In model (the little house icon) > Edit > Watermark settings (the little icon with the "OK" sign). There you can ad a background image with a bunch of settings after you start adding it (see screenshot) [image: XVJS_ScreenShot010.jpg] Then make sure that in your background settings ground is turned on (it should be by default in the 3D templates) otherwise the sky image will see through the ground: [image: aZTR_ScreenShot011.jpg]

Here is a recent thread on the subject http://www.sketchucation.com/forums/scf/viewtopic.php?f=79&t=13294