Slide Background Formatting in PowerPoint 2007
When formatting a slide background in PowerPoint 2007 (via Design tab $\rightarrow$ Format Background), the primary fill options available are:
Using a solid color: Available via Solid fill.1
Using a gradient fill: Available via Gradient fill.2
Using a picture or texture fill: Available via Picture or texture fill.3 (This also includes Pattern fill as a distinct option).4
Using a 3D effect is not a direct background fill option. While you can apply 3D Effects to objects on the slide, the background fill options are strictly limited to solid colors, gradients, pictures, textures, or patterns.