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All Spawn Modules in UE4 Niagara Explained

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Introduction:

• Hi guys, I’m Asif Ali, and you’re watching CGHOW! In today’s video, I’ll be explaining all the spawn modules in Niagara, so let’s dive right into it!

[Intro Music]

• Before we start, make sure to subscribe to my channel and click the bell icon so you don’t miss any of my future tutorials!

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Main Content:

1. Overview of Spawn Modules:
   • I’ve created a new particle system using the Fountain emitter. As you can see, we have several spawn modules here, like Spawn Rate, Spawn Burst, and Spawn Per Frame. These are all used to control how particles are emitted.
2. Spawn Rate Module:
   • Let’s start with the Spawn Rate module. This controls the number of particles spawned per second. By default, it’s set to 90 particles per second. You can adjust this to spawn more or fewer particles depending on your needs. If you set it to 1, it will spawn 1 particle per second.
   • Another option here is Spawn Probability, which lets you adjust the chance of particles spawning. Setting it to 0.1 means only 10% of the particles will spawn. If you set it to 0, particles won’t spawn at all!
3. Spawn Group:
   • Now let’s talk about the Spawn Group. This module allows you to group particles together and apply certain settings to them. For instance, if you want particles to spawn in separate locations or have different colors, you can assign them to different groups.
   • Here’s an example where I’ve used two spheres to spawn particles and offset their locations. The Spawn Group Mask lets you specify which particles will be grouped together.
4. Spawn Burst Module:
   • The Spawn Burst module is used to emit particles all at once, based on a set number. For example, if you set it to 1000, it will burst 1000 particles at once. You can also control when the burst happens with the Spawn Time setting. I’ve set it to 5 seconds here, so particles will spawn after a 5-second delay.
5. Spawn Per Unit and Spawn Per Frame:
   • Next, we have Spawn Per Unit and Spawn Per Frame modules. These work in similar ways but differ slightly in how they’re used.
     • Spawn Per Unit calculates particles based on the distance covered by your emitter. As you move your emitter, it will spawn particles accordingly. The smaller the unit size, the more particles will spawn.
     • Spawn Per Frame works similarly but spawns particles per frame. So, if you’re dealing with high frame rates, this module will spawn particles per frame rather than per second.
6. Comparing Spawn Per Unit and Spawn Per Frame:
   • To demonstrate the difference, I’ve set up two emitters with different settings. The Spawn Per Unit emitter will spawn particles based on how far the emitter moves. If I increase the speed of movement, you’ll see fewer particles spawn. The Spawn Per Frame emitter, however, spawns particles based on the frame rate, so even if I move the emitter quickly, it’ll spawn particles accordingly.

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Conclusion:

• So, now you have a better understanding of how all the spawn modules work in Niagara! These are crucial tools for creating particle systems, and I hope this clears up some of the confusion around them.
• In upcoming videos, I’ll cover more modules and go deeper into other aspects like forces, locations, and more.
• Thanks for watching, keep learning, and don’t forget to subscribe to my channel for more tutorials! Bye!

[Outro Music]

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Post-Video Notes:

• To make your tutorial more engaging, you can add visual representations of each module’s effect in real-time as you explain them.
• Include key settings and tips for each module in the video description and on-screen graphics.