My question is if it's possible to do something like this with Mathematica:

I know that it is possible to plot a surface with Plot3D and a 2D plot with DensityPlot, so I was wondering how to join them. Thanks!
My question is if it's possible to do something like this with Mathematica:

I know that it is possible to plot a surface with Plot3D and a 2D plot with DensityPlot, so I was wondering how to join them. Thanks!