Peter Kovesi provides various perceptually efficient colour ramps.the qFaro I/O plugin is not available in the archive version ( you have to use the installer).
test 03: compute cloud curvature, filter points by SF value.test 02: export coordinates to SF, computes its average and standard deviation, and min and max values.
test 01: load and save a cloud, get the scalar field names, compute the gravity center.