This command is similar to the ProtoInstance command except that the materials of the prototype are not copied into the current clump. Rather, the new polygons are assigned the current material.
This is useful if your object makes multiple uses of the same group of polygons, but you would like different groups to use different materials (i.e. appear differently). For example, a colorful bunch of balloons could be created by making a single balloon prototype, and then using ProtoInstanceGeometry to instantiate the balloon prototype multiple times each with a different color.
See ProtoBegin for more discussion of prototypes.
name is the name of the prototype, as declared in a previous ProtoBegin command.
Here is an example on how the ProtoInstanceGeometry command can be used. It uses more coding than needed but makes it easier to understand
modelbegin protobegin model1 color color1 # model code in here protoend protobegin Bunch protoinstancegeometry model1 color color2 protoinstancegeometry model1 color color3 protoinstancegeometry model1 protoend clumpbegin protoinstance Bunch clumpend modelend