---
title: "Parameter"
url: "https://help.maxon.net/c4d/en-us/Content/html/GVMOGRAPH_FALLOFF-ID_GVPORTS.html"
section_path: "MoGraph > MoGraph Nodes > Falloff > Example"
element_id: "GVMOGRAPH_FALLOFF"
group_id: "ID_GVPORTS"
description: "Any object can be connected to this port (preferably a Null Object) and be used to define the position and direction of the falloff field. In most cases …"
---

## Parameter

### Falloff Matrix

Parameter ID: `GV_MG_FALLOFF_MATRIX`

> **Tip:** Tip:For Shape Fields (e.g., Spherical Fields), this setting is no longer required because it includes several matrices that are evaluated by the Node.

Any object can be connected to this port (preferably a Null Object) and be used to define the position and direction of the falloff field. In most cases, the **Global Matrix** output port can be used.

### Sample Position

Parameter ID: `GV_MG_FALLOFF_POSITION` · Range: [XYZ ]

Feed position vectors into this port. The falloff/ color/ direction will be calculated exactly at this position. This value will then be automatically passed on to the **Value** output port.

### Normal Direction

Parameter ID: `GV_MG_FALLOFF_NORMAL` · Range: [XYZ ]

Use this setting to define a Normal direction. Only the Shader Field (and then only specific shaders that use a normalized surface direction such as the Fresnel or Falloff shaders) can make use of this.

### UVW Coordinate

Parameter ID: `GV_MG_FALLOFF_UVW` · Range: [XYZ ]

Here the [MoGraph UVW coordinates](https://help.maxon.net/c4d/en-us/Content/html/7443.html.md) or UVW texture coordinates for UVW-based Noise Fields are inserted.

### Array Size

Parameter ID: `GV_MG_FALLOFF_ITERATIONCOUNT` · Range: [1..2147483647]

### Index

Parameter ID: `GV_MG_FALLOFF_ITERATION` · Range: [0..2147483647]

These Ports are used to output the Field's effect of step-based Fields (e.g., Step Field). For **Array Size**, the number of elements (e.g., total object point count, clone count, Thinking Particles count, etc.) can be defined and for **Index** the element number (e.g., the 7th clone or the 17th particle) whose values should be ascertained.

### Value

Parameter ID: `GV_MG_FALLOFF_VALUE` · Range: [-∞..+∞]

This port reads out the calculated falloff value (Field channel **Value**). This value will generally lie between 0 and 1 and can be set to any output value range using the **Range Mapper** XPresso Node.

### Color

Parameter ID: `GV_MG_FALLOFF_COLOR` · Range: [XYZ ]

This is the color (**Color** channel) that the Field list produces.

### Direction

Parameter ID: `GV_MG_FALLOFF_DIRECTION` · Range: [XYZ ]

This output port outputs the Field channel **Direction** as a vector.

With this Port, Thinking Particles effects such as movement/coloring along splines - use the Spline object in the Field list - can, for example, be fed to Nodes (by combining its vector with the particle's velocity vector and plugging this into the velocity input Port **Set P Data**).

# Example

![Image: 006292.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/006292.jpg)\
Here the Falloff effects the cube's **Fillet Radius**.

The setup shown above scales the **Fillet Radius** of each cube in relation to its position within the Spherical Field. The **Range Mapper** Node serves to increase the output value of the Falloff Node from 0 - 1 to 0 - 100. All cubes are contained in the Iterator Node, **Object List**.