How is the complete Canvas/Windows shown in layers?

[wingoku]

This is so fascinating! I am just amazed how is the entire canvas/Windows is shown in 3D layers? What code is responsible for it?

[danielzeller]

The graphic scenes are drawn on a canvas so everything is in 2D space, except the BitmapMesh part which is kind of 3D. The layered Views in the menu are just rotated on the XY axis and scaled down to give it that 3D effect. The custom shadow rendering technique also contributes to the 3D feel.