AutoCAD 2010 does not support point clouds.
Point clouds were introduced with AutoCAD 2011.
There a few 3rd party applications available which also supports AutoCAD 2010.
Myself is with kubit but depending on your application you can also check out cloud worx or FARO Cloud.
But my recommondation is to use AutoCAD 2012 with the native point cloud engine in a first step.
If you then need more functionality you can check out the 3rd parties.
Look for AutoCAD LT 2013 Posted here.
There is some info on Point Clouds in this that may help your decision.
You may want to wait for LT 2013 to be released if you are interested in possibly more fuctionality here.
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