Occlusion Query in UE5 Niagara Tutorial

Occlusion Query in UE5 Niagara Tutorial | Download Files

Occlusion Query in UE5 Niagara

This tutorial shows how to use an occlusion query to control particle visibility behind objects in Unreal Engine 5 Niagara, and the project files are available to download.

Use it for lens flares, glows and sun effects that should hide behind walls, and see the related posts below for more Niagara techniques.

More Niagara techniques: Particles on Sphere Interaction · Spawn Particles Near the Player · GPU Particles FX in UE5 Niagara

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How to Use Occlusion Query in Niagara (UE5)

In this video tutorial, we explore the Occlusion Query technique in Unreal Engine 5’s Niagara system to achieve better visibility control for particle effects. This method is ideal for creating realistic visual effects while maintaining optimal performance.

Key Points:

Creating the Emitter: We start by creating a new Niagara Emitter and adding a Sprite Renderer with an additive material. The material is adjusted to be translucent for better visibility.
Adding Particles: We add a sphere with 200 units and set the particle velocity and gravity to zero. The particle count is increased to 2000 for better results. GPU simulation is enabled for optimal performance.
Color Adjustment: The particles are assigned two colors: red and green. A color change is applied based on their proximity to the surface.
Using the Occlusion Query: The occlusion query node is added to the effect. It checks if a particle is near a surface and assigns it a visibility fraction. If the particle is near the surface, it changes color to green.
Visibility Control: The visibility fraction is clamped to ensure there are no negative values. This helps control the visibility of the particles on the surface.
Animation and Effects: Additional effects, such as adding curl noise to the particles, enhance the overall look. Transparent particles are killed to avoid clutter.

By the end of this tutorial, you will have a clear understanding of how to implement occlusion queries in your Niagara effects and make your particle systems more efficient and visually appealing.

Spawn Particle on Surface near to the player in UE5 Niagara Tutorial

Collision Query | UE5 Niagara #ScratchPad Module #9

Particles on Sphere Interaction in UE5 Niagara Tutorial

Ashif Ali

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