Ok. So, I assume that colours based on the value-range of independent variables would be similar. Will try.. -- View this message in context: http://r.789695.n4.nabble.com/3D-surface-colour-based-on-the-values-of-X-or-Y-data-points-tp3060018p3060162.html Sent from the R help mailing list archive at Nabble.com.