Show[Graphics3D[{
    PolygonColor,ConvertToMesh[ppoly],
    VptDepColor,ConvertToMesh[pvptdep],
    (*IncrementalColor,ConvertToMesh[pincremental],*)
    SimpleImposterColor,ConvertToMesh[psimple],
    MeshedImposterColor,ConvertToMesh[pmeshed],
    IwDColor,ConvertToMesh[piwd],
    LDIColor,ConvertToMesh[pldi]
},
Lighting->False,AspectRatio->Automatic,
ViewPoint->{-2.353, -1.931, 1.479}
,AxesLabel->{"log T","log distance","-Log bytes/s"},
Axes->True,BoxRatios->{1,1,.5},Ticks->{LogScale,LogScale,LogScale},
(*PlotRange->{{-1,1},{0.5,2},Automatic}*)
PlotRange->Automatic]]