Number of polygons vs lifetime and distance

Show[Graphics3D[{
    PolygonColor,ConvertToMesh[ppoly],
    VptDepColor,ConvertToMesh[pvptd],
    SimpleImposterColor,ConvertToMesh[psimple],
    MeshedImposterColor,ConvertToMesh[pmesh]
},
Lighting->False,AspectRatio->Automatic,
AxesLabel->{"log lifetime(s)","log distance","log #polys"},ViewPoint->{-1.661,-1.204,
    0.947},
PlotRange->{0,4},
Axes->True,BoxRatios->{1,1,.5}]]