Resampling a Cloud

Point Cloud has two methods of cloud reduction.  There is a fast, naive method, and a slower, more intelligent method.
To resample a Cloud, right-mouse click the cloud in the Current Project tree and select Resample. This will open the Resample Cloud dialog.

Step method is much faster at the cost of being less intelligent. It will simply reduce the cloud to 1 / Step its current size by only keeping one out of every nth vertices.
For example, a step size of four, Resample will traverse the cloud and only keep every fourth vertex, deleting three for each one it keeps.

OC-Tree tree method isa more intelligent process, but it can have significantly longer run times than the Step Method. OC-Tree divides the bounding box of the cloud into blocks defined by the resolution size and then filters out points based on the minimum and maximum parameters.
If a block has less than the minimum number of points, its contents will be deleted. If a block has more than maximum points, random points within that block will be removed until it has maximum points inside it.

Click the Green Tick to resample the Cloud. The new Cloud will be displayed in the Clouds sub-menu of the Current Project tree.