---
title: "Shader Properties"
url: "https://help.maxon.net/c4d/en-us/Content/html/XSLAPROXIMAL-ID_SHADERPROPERTIES.html"
section_path: "Material Manager > Classic Materials > Classic material > Channel Shaders > Proximal Shader > Shader Properties"
element_id: "XSLAPROXIMAL"
group_id: "ID_SHADERPROPERTIES"
description: "Drag the names of the object or objects that will be used to calculate Proximal from the Object Manager into this box. In the case of particles, drag the …"
---

## Shader Properties

### Objects

Parameter ID: `SLA_PROXIMAL_OBJECTS`

Drag the names of the object or objects that will be used to calculate Proximal from the **Object Manager** into this box. In the case of particles, drag the Emitter

- (Cinema 4D particles) or Particle Geometry object
- (Thinking Particles) into the Objects box.

### Exclude Parent

Parameter ID: `SLA_PROXIMAL_EXCLUDE_PARENT`

If **Include Child objects** is enabled and **Exclude Parent** is checked then the parent object is disregarded in the Proximal calculations.

### Include Subobjects

Parameter ID: `SLA_PROXIMAL_INCLUDE_SUBOBJECTS`

If enabled, the children of the found object will be included in the proximal calculations.

### Use Vertices

Parameter ID: `SLA_PROXIMAL_USE_VERTICES`

Allows the user to specify that the sampling points for the Proximal shader to use are defined by the vertices of the named polygon object. This allows for effects such as one object passing through another object. The object must be a polygon object.

### Use Edges

Parameter ID: `SLA_PROXIMAL_USE_EDGES`

![Image: 004437.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/004437.jpg)\
Use Edges enabled (left) and disabled (right).

Enable this option to include edges for luminance effects.

### Polygon Radius

Parameter ID: `SLA_PROXIMAL_POLYGON_RADIUS`

Similar to **Use Vertices** except it uses the center of each polygon and makes the maximum distance (**End Distance** at 100%) the radius of the polygon. This helps with the problem of vertices being spread unevenly and gaps happening when an object passes through another.

### Function

Parameter ID: `SLA_PROXIMAL_FUNCTION`

Falloff function to be used to calculate the Proximal intensity.

Linear

Intensity is 100% of the Intensity value at Start Distance, 0% at End Distance and falls off linearly in between.

Square

Intensity is 100% of the Intensity value at Start Distance, 0% at End Distance and falls off by the square of the distance in between.

Cubic

Intensity is 100% of the Intensity value at Start Distance, 0% at End Distance and falls off distance cubed in between.

Step

Intensity is 100% of the Intensity value between Start Distance and End Distance and 0% everywhere else.

Inverse

Intensity is 100% of the Intensity value at Start Distance and falls off as the inverse of distance and is clamped to 0% at End Distance.

Inverse Square

Intensity is 100% of the Intensity value at Start Distance and falls off as the inverse of distance squared and is clamped to 0% at End Distance.

Inverse Cubic

Intensity is 100% of the Intensity value at Start Distance and falls off as the inverse of distance cubed and is clamped to 0% at End Distance.

Smooth

This gives a smoother falloff when using Proximal for bump mapping or displacement.

### Blend Mode

Parameter ID: `SLA_PROXIMAL_BLEND_MODE`

Allows for different possibilities when blending each sampled point together. For instance, the **Add** type of blend makes very blown out values, necessitating the user to tweak the values to achieve a good result. The modes **Lighten**, **Screen**, **Difference** and **Exclusion** increase the ease of achieving the desired effect. The **Screen** blend type is in most cases the best choice, as it yields aesthetically pleasing results.

### Start Distance

Parameter ID: `SLA_PROXIMAL_START_DISTANCE` · Range: [0..+∞%]

The distance at which the object causes 100% luminance.

### End Distance

Parameter ID: `SLA_PROXIMAL_END_DISTANCE` · Range: [0..+∞%]

The distance at which the object no longer affects the surface luminance. A value of 100% means 100 m. However, when using Polygon Radius, the percentage value is the same as the polygon radius, which of course can be different for each polygon.

### Intensity

Parameter ID: `SLA_PROXIMAL_INTENSITY` · Range: [0..+∞%]

Maximum intensity that each object / particle adds.