[GIS] Seeking open source/free software for generating 3D view of mapping

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Is there any software that will generate a 3D view given a DTM/height data and raster mapping, and output an image in a printable resolution?

I am looking for something similar to what you'd find in a commercial hike planning application, but free or open source preferably.

Best Answer

With this tutorial (unfortunately only in German) I managed to make some 3D-maps from Openstreetmap data and SRTM height data using Povray:

enter image description here

(To be honest, the left one is by me, the right one by maxbe)