4 axis plot

Does anybody know whether it is possible to make a 3D plot with a 4th axis (color) as an independent 4th parameter? I can’t find it in TGraph2D and TGraph3D does not exist as far as I know…

From a tree you can plot a 3D scatter plot using 4 variables. The fourth variable will be mapped on a color scale.
Also you can use the gl5d option llike in: