How to plot a set of densities in 3D using R?

Question

I need to plot, in 3D, a set of densities associated to a time series. More precisely, I would like to be able in R to build an image close to this example

Answer 1

This is how far I got thanks to Rob's hint. I used persp() to create an empty plot and added polygons and lines to it:

However, it is not as pretty as the original one... :(