Increasing 3D surface plot thickness using the Plot3D package in R

Question

Is there a way to increase a 3D surface plot thickness like the plots here using the persp3D() function in the plot3D package in R? Can't seem to find anything in the documentation.

Answer 1

I was able to get this to work by creating multiple surfaces and connecting them using the curtain argument of the plot3D function. The thickness was controlled by the z argument of each surface. In case anyone needs the sample code, here it is;

For simplicity, I used meters to specify thicknesses/height of the surfaces

library(plot3D)
library(plot3Drgl)

# volcano data range
clim <- range(volcano)

# Surface 1
persp3D(z = volcano, zlim = c(0, 600), clim = clim, 
        box = FALSE, plot = FALSE, curtain = TRUE, border = "black")

# Surface 2 - 20m below surface 1
persp3D(z = volcano - 20, clim = clim, colvar = volcano, 
        add = TRUE, colkey = FALSE, plot = FALSE, curtain = TRUE, border = "black")

# Surface 3 - 40m below surface 1
persp3D(z = volcano - 40, clim = clim, colvar = volcano, 
        add = TRUE, colkey = FALSE, plot = FALSE, curtain = TRUE, border = "black")

# Surface 4 - 60m below surface 1
persp3D(z = volcano - 60, clim = clim, colvar = volcano, 
        add = TRUE, colkey = FALSE, plot = TRUE, curtain = TRUE, border = "black")

# Surface 5 - 80m below surface 1
persp3D(z = volcano - 80, clim = clim, colvar = volcano, 
        add = TRUE, colkey = FALSE, plot = TRUE, curtain = FALSE, border = "black")

# Open rgl for interactive viewing
plotrgl()