How can I combine vector & Raster onto DEM?

[Philip Warner]

What I want to do is combine the raster and vector (geology and roads),
then put the resulting map over the DEM to get a combined 3d view.

I can put a raster map over a DEM, and I can put a vector map over a DEM,
but I don't seem to be able to do both.

I have looked in the mailing list and in two of the tutorials, but with no
luck. If someone can point me to a description of how to do this, or tell
me how I can do this, that would be great.

Thanks,

Philip Warner.

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