---
title: "Inputs"
url: "https://help.maxon.net/c4d/en-us/Content/html/NET_MAXON_NEUTRON_GEOMETRY_CONVEXHULL-NET_MAXON_NODE_BASE_GROUP_INPUTS.html"
section_path: "The Node Editor > The individual Assets > Geo Modifier > Convex Hull > Inputs"
element_id: "NET_MAXON_NEUTRON_GEOMETRY_CONVEXHULL"
group_id: "NET_MAXON_NODE_BASE_GROUP_INPUTS"
description: "For this geometry we calculate a convex hull. If a hull is to be calculated across multiple shapes, they must first be combined into one geometry using a …"
---

## Inputs

### Geometry

Parameter ID: `GEOMETRYIN`

For this geometry we calculate a convex hull. If a hull is to be calculated across multiple shapes, they must first be combined into one geometry using a *Joint Node*.

### Shrink

Parameter ID: `SHRINKIN` · Range: [0.00..+∞]

This value can be used to reduce the calculated envelope. The effect corresponds to moving the new polygons along their normals towards the center of the geometry. Similarly, the effect can be thought of as if the introduced geometry were reduced in size before the polygon hull is calculated.