Silverlight 3 introduced the first steps into allowing 3D content to be manipulated within the Silverlight Plugin. The following posts feature examples and/or tutorials in how to implement 3D content within Silverligh (In date order / oldest first):

• Controlling Projection in Silverlight 3
• Shadow effect using 3D projection in Silverlight 3
• Creating a 3D cube with images in Silverlight 3
• Using projection to build a 3D carousel in Silverlight 3
• Creating a 3d particle effect using just storyboards and behaviours
• Creating a 3d spiral animation using projection in Silverlight 3