---
title: "Transparency"
url: "https://help.maxon.net/c4d/en-us/Content/html/XSLACHEEN-ID_CHEEN_TRANSPARENCY.html"
section_path: "Material Manager > Classic Materials > Classic material > Volumetric Shaders > Cheen Shader > Transparency"
element_id: "XSLACHEEN"
group_id: "ID_CHEEN_TRANSPARENCY"
description: "Makes the object a completely dense object instead of one surface. Disallows illumination, reflection, and environment to be evaluated for the second …"
---

## Transparency

### Refraction Index

Parameter ID: `SLA_CHEEN_TRANS_REFRACTION_INDEX` · Range: [0.25..4.00]

The refractive index of the material.

### Internal Refraction

Parameter ID: `SLA_CHEEN_TRANS_INTERNAL_REFLECTION`

Allows refracted rays to refract when appropriate.

### Solid Object

Parameter ID: `SLA_CHEEN_TRANS_SOLID_OBJECT`

Makes the object a completely dense object instead of one surface. Disallows illumination, reflection, and environment to be evaluated for the second surface intercepted of the object.