Intersection line in multiple 3D surface plot

Hey everybody,
I created a plot with multiple 3D surfaces using the following code:

plot_ly(showscale = FALSE) %>%
           add_surface(z = plotData1, text="67kW",opacity = 0.38) %>%
           add_surface(z = plotData2, text="102kW",opacity = 0.58) %>%
           add_surface(z = plotData3, text="200kW",opacity = 0.78) %>%
           layout(
             title = paste(v, " requirements for ", f, " farm type, ", s, sep=""),
             scene = list(xaxis = x, yaxis = y, zaxis = z))

and it looks like the following graph:

I would like to add a intersection line where the surfaces cross.
Does anybody know if this is possible?
Thanks in advance
Julia