3D plots

One more question..

I succeed in converting meshed plots in 3d, command "mesh", from matlab to tikz. But when I try to convert "plot3" scatter plots, they are all projected down to z=0.

So if I plot a "plot3" separately, it becomes a normal 2d-graph. And if I plot a "plot3" together with a mesh, it will result in a two-dimensional plot in a 3d figure.

Is that a known bug?

/Lars