The are in addition to the more than 500 plants in the old AR3/AR4 plants which also work with IRender nXt.
These are 'fractal' plants - meaning that detail is relative to the resolution of your image. Each plant is generated differently which automatically creates a realistic effect when using multiple instances of the same plant.
Create SketchUp components to represent IRender nXt plants. These are then automatically rendered as 'fractal' plants.
These plants are also available from the 3D Warehouse: IRender Plants
Tree placed in SketchUp and rendered wirh nXtRender/IRender
Create custom, fractal, trees and plants. The tree is regenerated
each time the tree is rendered. The more you are zoomed in, the more detail is included.
This is especially useful for close ups of trees and other plants.
For background trees, these is an option to render using the 2D tee image store in SketchUp,
which can improve the rendering time when you have lots of background trees.