---
title: "Roughness"
url: "https://help.maxon.net/c4d/en-us/Content/html/XSLABANZI-ID_BANZI_ROUGHNESS.html"
section_path: "Material Manager > Classic Materials > Classic material > Volumetric Shaders > Banzi Shader > Bump Clipping"
element_id: "XSLABANZI"
group_id: "ID_BANZI_ROUGHNESS"
description: "Used to add bump or grit to the material. Some of these settings are not available for the Banji shader, because Banji has a channel to create wood …"
---

## Roughness

Used to add bump or grit to the material. Some of these settings are not available for the Banji shader, because Banji has a channel to create wood structures.

### Amplitude

Parameter ID: `SLA_BANZI_ROUGHNESS_AMPLITUDE` · Range: [-1000..1000%]

Scales the amplitude of the bump algorithm. The appropriate range is 0.0001% to 1,000%.

### Delta

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

Delta is a scaling factor to use in sampling the texture for evaluating slope to be used in evaluating the bump. This allows you to get very sharp bump with minute detail that is not possible with the standard static bump delta.

# Bump Clipping

The noise is calculated in a range of 0% - 100%. These values clip that range to provide for bumps with plateaus (like certain stucco).

### Low Clip

Parameter ID: `SLA_BANZI_ROUGHNESS_LOW_CLIP` · Range: [0..100%]

Low Clip defines the low boundary for the clip (no bump under this value).

### High Clip

Parameter ID: `SLA_BANZI_ROUGHNESS_HIGH_CLIP` · Range: [0..100%]

High Clip defines the high boundary for the clip (no bump over this value).

### Grit Color

Parameter ID: `SLA_BANZI_ROUGHNESS_GRIT_COLOR`

These controls set the color used as a base to attenuate (multiply by) the specular, diffuse, reflection, environment and ambient results. Negative values invert the grit application. The appropriate range is -200% - 200%.

### Grit Intensity

Parameter ID: `SLA_BANZI_ROUGHNESS_GRIT_INTENSITY` · Range: [-200..200%]

Use this setting to define the visibility of bumpy areas.

### Grit Low Clip

Parameter ID: `SLA_BANZI_ROUGHNESS_GRIT_LOW_CLIP` · Range: [0..100%]

Low Clip defines the low boundary for the clip (no bump under this value).

### Grit High Clip

Parameter ID: `SLA_BANZI_ROUGHNESS_GRIT_HIGH_CLIP` · Range: [0..100%]

Color will be set to **1** if clipping is greater than or even to this value.