Justin Geis: Justin Geis is the founder of The SketchUp Essentials and started using SketchUp while he was working as a general contractor in 2008 and after using it he found that SketchUp is extremely powerful that he just started to use it in his personal works also.

Then he started The SketchUp Essentials as a place where he could share his ideas of using SketchUp easily through some tutorials and tips to help other users controlling the power of 3D Modeling in everyday lives.

Here are four ways to add background images in the SketchUp model:

• The first way is simple one where users just need to draw a face in the background and apply the background image to it. Though it is a simpler version but it is often limited to a few camera angles.
• In the second method, users can add a watermark to the image; instead of adding actual geometry to the image users can create a watermark in the styles section of model using the background image. This thing will always stay behind the model though it will be a bit difficult to get the scene set up.

• The third way is to create a curving background behind the model which has many benefits like it allows users to adjust camera angle and while rendering the model, users should get some reflection of the sky in the glass which make it look more realistic.
• The last way is to download a sky dome which is basically a dome drawn in SketchUp with a sky material applied to it. This sky model can completely covers the model though it needs some UV mapping/advanced texturing to make.