How  to use SphericalDensityPlot3D

First It has to be loaded

<< SphericalDensityPlot3D.m

A very simple example

SphericalDensityPlot3D[
      Re[SphericalHarmonicY[4, 2, th, ph]], {th, 0, Pi}, {ph, 0, 
        2  Pi}]

Lets apply a better resolution...

SphericalDensityPlot3D[
      Re[SphericalHarmonicY[4, 2, th, ph]], {th, 0, Pi}, {ph, 0, 2  Pi}, 
      PlotPoints -> {40, 80}]

...or take out a region

SphericalDensityPlot3D[
      Re[SphericalHarmonicY[4, 2, th, ph]], {th, 0, Pi/2}, {ph, 
        0, -Pi/2}, PlotPoints -> {40, 40}]

what about some contours

SphericalDensityPlot3D[
      Re[SphericalHarmonicY[4, 2, th, ph]], {th, 0, Pi/2}, {ph, 
        0, -Pi/2}, PlotPoints -> {40, 40}, 
      ContoursOn -> True]

Lets put the legend below

SphericalDensityPlot3D[
      Re[SphericalHarmonicY[4, 2, th, ph]], {th, 0, Pi/2}, {ph, 
        0, -Pi/2}, PlotPoints -> {40, 40}, ContoursOn -> True, 
      LegendBelow -> True]

another color map, more contours

SphericalDensityPlot3D[
      Re[SphericalHarmonicY[4, 2, th, ph]], {th, 0, Pi/2}, {ph, 
        0, -Pi/2}, PlotPoints -> {40, 40}, ContoursOn -> True, 
      ContourNumber -> 10, ColorFunc -> Hue]