Here’s a list of 3D resources I’ve found useful from a WPF perspective: Using 2D controls in a 3D environment Creating Rich 2D and 3D Content in WPF Interacting with 2D on 3D in WPF CodePlex: 3D Tools for the Windows Presentation Foundation This article covers most of what you need to know about Drag-Drop (virtual coordinate system) Finally, Jaime has [...]