for 3ds Max that allows you to extend the plugin's built-in capabilities using simple expressions
Many effects allow you to link attributes directly to 3ds Max modifiers, such as connecting scatter height to a VRayDisplacementMod controller for live updates. ITOOSOFT Forum Common Use Cases You can find these and more in the iToo Software Effects Library Altitude-Based Changes: forest pack effects
Scale items down or change their animation speed as they get closer to the edge of a scattering area. Animation Control: for 3ds Max that allows you to extend
Advanced "Effects Authors" can write their own expressions to manipulate properties like fpItem.scale fpItem.rotation fpItem.tint Parameter Linking: forest pack effects
The and Render effects allow you to dictate which geometry loads based on camera distance.