front end - generating pdf using UseFrontEnd

I run mathematica on a remote server and run it in batch mode using /math -noprompt -script 'scriptname.m' &

Now, I use ssh -X to connect to the server. The server is linux based and my computer is a mac. I use x11 forwarding.

I would like to generate PDFs in the above mentioned 'script.m'. In my code, how should I incorporate UseFrontEnd? should I invoke it first using ConnectToFrontEnd[] ? Should I use UseFrontEnd[Export["blah.pdf",fig]] or is it a one time thing? Also, when using the UseFrontEnd command, is it required that I do ssh -X/Y or is it sufficient if I do ssh?

I greatly appreciate your help.

Thanks.

P.S - I am using mathematica 8

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plotting - Filling between two spheres in SphericalPlot3D

Manipulate[ SphericalPlot3D[{1, 2 - n}, {θ, 0, Pi}, {ϕ, 0, 1.5 Pi}, Mesh -> None, PlotPoints -> 15, PlotRange -> {-2.2, 2.2}], {n, 0, 1}] I cant' seem to be able to make a filling between two spheres. I've already tried the obvious Filling -> {1 -> {2}} but Mathematica doesn't seem to like that option. Is there any easy way around this or ... Answer There is no built-in filling in SphericalPlot3D . One option is to use ParametricPlot3D to draw the surfaces between the two shells: Manipulate[ Show[SphericalPlot3D[{1, 2 - n}, {θ, 0, Pi}, {ϕ, 0, 1.5 Pi}, PlotPoints -> 15, PlotRange -> {-2.2, 2.2}], ParametricPlot3D[{ r {Sin[t] Cos[1.5 Pi], Sin[t] Sin[1.5 Pi], Cos[t]}, r {Sin[t] Cos[0 Pi], Sin[t] Sin[0 Pi], Cos[t]}}, {r, 1, 2 - n}, {t, 0, Pi}, PlotStyle -> Yellow, Mesh -> {2, 15}]], {n, 0, 1}]

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plotting - Adding a thick curve to a regionplot

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