Test using the laser scan data from Radiohead's House of Cards video. Provided at google here:
code.google.com/p/radiohead/

It's read into Blender with a little python script, and rendered as a volume, using the 'point density' texture, in the sim_physics branch.

.blend file including the script is here: mke3.net/projects/tests/hoc_pointcloud.blend

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