Before I go a step further, it is important to note how to install LAStools into the processing toolbox of QGIS. Essentially there are two parts: 1) adding a new "Lidar" folder to the QGIS program folder and 2) activating and linking LAStools to QGIS. Avoid placing this folder in any directory with a name that has spaces in its name, for example \My Documents\.
After that, it should be smooth sailing! It is a really powerful toolbox that integrates well into QGIS. There is also an ArcGIS toolbox too.
LAStools comes with a lot of different features for viewing and understanding lidar data. Just a few of them are implemented below. Click on any of the images to magnify them.
|The same lidar data classified into different categories using lasclassify--and triangulated.|
Using las2dem and las2iso...
|Contours overlaying a raster DEM using las2dem and las2iso.|
The details of the sphinx, including head, front and rear legs, can be easily distinguished.