Upgrading from:

Graphics`Graphics3D`

ListPointPlot3D has been added to the built-in Mathematica kernel.
ListSurfacePlot3D has been added to the built-in Mathematica kernel.
BarChart3D has been added to the built-in Mathematica kernel.
Histogram3D has been added to the built-in Mathematica kernel.

The functionality of ScatterPlot3D is now available in the built-in Mathematica kernel function ListPointPlot3D:

Version 5.2 << Graphics`Graphics3D`;
ScatterPlot3D[Table[{Cos[t], Sin[t], Sqrt[t]}, {t, 0, 4 Pi, 0.2}]]

ListSurfacePlot3D is now a built-in Mathematica function:

Version 5.2 << Graphics`Graphics3D`;
ListSurfacePlot3D[
 Table[{Cos[t] Cos[u], Sin[t] Cos[u], Sin[u]}, {t, 0, π, π/5}, {u, 0, 
   π/2, π/10}]]

Histogram3D is now a built-in Mathematica function:

Version 5.2 << Graphics`Graphics3D`;
Histogram3D[{{7, 0}, {0, 8}, {0, 8}, {3, 7}, {1, 6}, {1, 10}, {4, 
   9}, {1, 5}, {10, 6}, {0, 2}, {5, 0}, {7, 6}, {9, 7}, {0, 9}, {3, 
   9}}]

BarChart3D is now a built-in Mathematica function:

Version 5.2 << Graphics`Graphics3D`;
BarChart3D[{{2, 1, 6, 7, 4}, {7, 9, 1, 0, 4}, {5, 2, 6, 2, 7}, {4, 3, 
   0, 0, 10}, {8, 9, 1, 0, 9}}]

Display stacked 2D plots:

Version 5.2 << Graphics`Graphics3D`;
StackGraphics[Table[Plot[Sin[x]^n, {x, 0, π}], {n, 5}]]

The functionality of SkewGraphics3D and TransformGraphics3D is now available in the built-in Mathematica kernel function GeometricTransformation:

Version 5.2 << Graphics`Graphics3D`;
Show[SkewGraphics3D[
  Graphics3D[
   Plot3D[Sin[x + Cos[y]], {x, 0, 2 π}, {y, 0, 2 π}]], {{1, 0, 1}, {0,
     1, 0}, {0, 0, 1}}]]

Project a graphics object onto a plane:

Version 5.2 << Graphics`Graphics3D`;
bell = ParametricPlot3D[{Sin[t], Sin[2 t] Sin[u], 
   Sin[2 t] Cos[u]}, {t, -π/2, π/2}, {u, 0, 2 π}]
Project[bell, {1, 1, 0}]

The functionality of Shadow, ShadowPlot3D, and ListShadowPlot3D can be obtained using the built-in Mathematica kernel function Scale:

Version 5.2 << Graphics`Graphics3D`;
Shadow[Plot3D[Sin[x y], {x, 0, 3}, {y, 0, 3}]]

The original package is now available on the web at library.wolfram.com/infocenter/MathSource/6766.