---
title: "GI Tab"
canonical: "https://documentation.chaos.com/space/VC4D/116853270/GI%20Tab"
format: markdown
---
This page provides information about the GI tab of the V-Ray Render Settings in Cinema 4D. 


## **Overview**

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## **GI**

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## **Light Cache**

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> Macro (anchor)



### Advanced Light Cache Options

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## **Brute Force**

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## **Caustics**

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V-Ray supports rendering caustics effects by using one of the following techniques: *photon mapping* or *progressive*.

The new Progressive Caustics Solver uses advanced sampling techniques, and is able to trace as many photons as required without suffering the memory constraints of traditional Photon Mapping techniques.

IT is loosely based on two papers: one on [Progressive Photon Mapping from Knaus and Zwicker](http://www.cs.jhu.edu/~misha/ReadingSeminar/Papers/Knaus11.pdf), and another on [Metropolis-guided caustics tracing from Šik and Krivánek](https://cgg.mff.cuni.cz/~jaroslav/papers/2019-corona-caustics/2019-sik-corona-caustics-paper.pdf).

The other method, Photon Mapping, is a two-pass technique.

*See the **[Caustics](https://docs-chaos.atlassian.net/wiki/spaces/VC4D/pages/116855220)** page for more information.*