---
title: "Volumetric Rendering In-Depth"
canonical: "https://documentation.chaos.com/space/PHX4MAX/124363172/Volumetric%20Rendering%20In-Depth"
format: markdown
---
This page provides some useful tips for rendering volumetric effects.

## **Volumetric vs Volumetric Geometry mode when rendering on the CPU**

---


## **AUR vs VDB Cache Format**

---

![image](media://baec15a4-d9de-4949-bd36-9886a6421c74)


![image](media://96faded6-da94-4758-a859-deaed74ec66c)



## **Core Volumetric Shader Settings**

---


---



---



---


![image](media://4e66d112-fedb-42e5-938b-82f76916fe21)


> Macro (ui-text-box)
> 
> When rendering with **V-Ray GPU**, the **Volume Light Cache** option is ignored entirely - the Phoenix Light Cache is a CPU-only 'hack' used to speed up CPU rendering.


---



---


![image](media://4b8ac51b-1f39-4411-a877-7807a625a6bf)


![image](media://ba089df3-b36d-4ab7-bb48-8905e9f9d5c2)



---


![image](media://7f6eb9d3-0a25-49e6-beb3-02dff2fc71e8)


![image](media://c6bd8401-603d-4ee7-98a6-b28946480a55)



---



---



---



---


![image](media://732de7d7-1c27-451f-ac4d-b0eb90e1cafd)


![image](media://bfbe34ba-ada7-4255-bf72-3b41f9736920)



---


![image](media://732de7d7-1c27-451f-ac4d-b0eb90e1cafd)


![image](media://58c93e8b-48d5-4651-80ab-65cc335dd79c)



---


![image](media://cd2f6679-92b7-4007-b09b-7065f4dfa8cb)



---



## **Smoke Opacity and Probabilistic Volumetrics**

---

![image](media://512ac279-9cb9-49bc-9f9b-b1cb2aee8318)


![image](media://ea55cdcd-2c1f-4092-8797-3046691a487a)



## **V-Ray Adv vs V-Ray GPU Rendering of Volumetric effects**

---

![image](media://b362f9e0-8c44-4cac-9391-619cf887fa24)


![image](media://0b3079cf-7eff-4bab-bb19-7e967626b845)