# HTrace WSGI in Ray-Traced Reflections

This page describes a module within the **HTrace: World Space Global Illumination** (WSGI) asset. It provides indirect lighting inside **Unity HDRP's native ray-traced reflections**. This module is exclusive to Patreon.

Please keep in mind that this approach comes with trade-offs and may not be suitable for all projects.

{% embed url="<https://youtu.be/6BmYH1yRbwo?si=Xo2KHudTUOp4RJib>" %}

## Setup&#x20;

1. Download the HTrace WSGI package containing the Reflection module through Patreon, and install it in your project. Once installed, you should see a new foldout in the HTrace UI called **Reflection Indirect Lighting**.
2. Enable **Unity’s ray-traced reflections** and set the to the **Performance** mode.
3. Set the **Indirect Evaluation Method** dropdown in the HTrace UI to either **Tracing** or **Approximation**.

{% tabs %}
{% tab title="None" %}

<figure><img src="/files/grMmpWnQg6anIRNTjiW3" alt=""><figcaption><p>Indirect Evaluation Method set to None</p></figcaption></figure>
{% endtab %}

{% tab title="Tracing" %}

<figure><img src="/files/Li7DeaOUZUva9exkeLkU" alt=""><figcaption><p>Indirect Evaluation Method set to Tracing + DLSS used as a denoiser</p></figcaption></figure>
{% endtab %}

{% tab title="Approximation" %}

<figure><img src="/files/c4bAwph6w3SX5s9omb7J" alt=""><figcaption><p>Indirect Evaluation Method set to Approximation</p></figcaption></figure>
{% endtab %}
{% endtabs %}

{% hint style="info" %}
Indirect lighting is only visible within the first bounce of ray-traced reflections. Recursive bounces are not supported at the moment. For multiple bounces, consider using reflection fallbacks such as the sky or reflection probes.
{% endhint %}


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