For Descriptions that have archive primitives, you can use the Particle modifier to save and load primitive locations as particles. Use this modifier to animate the location and orientation of individual primitives outside of XGen and then use this information in XGen for further processing and rendering. For example, you can select a group of leaves on a tree model and save their position and orientation as particle database (.pda or .pdb) files.
Animation for the leaves can be saved and loaded back into XGen using the Particle modifier. When you render the scene, XGen ignores the original location of the primitives and uses the positions specified in the particle database file.
Lets you control how the modifier affects primitives in specified areas of the surface. For example, use Mask to load or an expressions or create a Ptex map that masks out the effect of the modifier.
Name and location of the particle database (.pda or .pdb) file used as input or output of the modifier's operation.