---
title: "Volumetric Rendering In-Depth"
canonical: "https://documentation.chaos.com/space/PHX4MAYA/126028820/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://8babe0c0-d9e9-4f3c-a6dd-42befa611d91)


![image](media://69ada07a-e917-45e0-8cef-9d060107b9fa)


 

## **Core Volumetric Shader Settings**

---

 

---

 

 

---

 

 

---

 

![image](media://77e55cfb-f302-43f3-980c-ab9ad7d5ed31)


> 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://f22cd090-a8d1-4de9-8851-bd477d716076)


![image](media://ea7f4011-6a32-4f3b-bd46-7bb7489b999a)


 

---

 

![image](media://47a0a5fd-625a-4a6b-b702-5d63762d1222)


![image](media://fbe3b9bc-2da2-43ac-91f6-35c567aa68ae)


 

---

 

 

---

 

 

---

 

 

---

 

![image](media://9d3ae03c-c89b-4bd1-9c20-e26579f95d3a)


![image](media://42fba72a-e1f0-4d3b-9daa-11c233299f06)


 

---

 

![image](media://9d3ae03c-c89b-4bd1-9c20-e26579f95d3a)


![image](media://d007159b-cb83-4036-a7e5-e917633c9456)


 

---

 

![image](media://0c1b50fa-3dda-4ca6-9b17-ad0b1b1c7403)


 

---

 

## **Smoke Opacity and Probabilistic Volumetrics**

---

![image](media://bbac527a-3996-41f2-ad96-c2fec15402c7)


![image](media://2e0c77df-e3ef-481b-81bd-d90cec57a57f)


 

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

---

![image](media://f2726a37-5b93-47e2-9d37-5456723b2caf)


![image](media://2b090112-9f59-45ed-8d9c-2beca296dae0)