Custom FX in UE4 Niagara Tutorial

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Introduction:

• Greeting: “Hi guys, I’m Asif Ali, and you’re watching CGHOW. In today’s tutorial, I’ll show you how to create a cool licking trail effect in Unreal Engine Niagara. Let’s get started!”
• Call to Action: “First of all, subscribe to my YouTube channel and click on the bell icon to receive notifications for all new videos.”

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Tutorial Steps:

1. Setting Up the Project:
   • The video begins with creating a new Niagara system in Unreal Engine 4.27.
   • Select “Niagara FX” and delete unnecessary particles, keeping only the Burst particle.
   • Adjust the Life and Size of the particle for visibility.
   • Set the color to red for better clarity.
2. Animating the Position:
   • Use Position in Niagara to animate the particle’s position.
   • Use a Curve or Sine wave to animate the particle along the X, Y, and Z axes.
   • For a spiral effect, add a Cosine curve to the Y-axis.
   • Animate the particle’s position to create a spiral motion.
3. Creating the Trail:
   • Duplicate the emitter and modify it to create a trail.
   • Remove the position animation and use Particle Reader Attribute to spawn particles from the first emitter (source).
   • Adjust Spawn Rate, Life, and Size for the trail.
4. Fixing Overlapping Particles:
   • To avoid overlap, create a Scratch Pad and use two particles with different indices (0 and 1).
   • Use a Vector by Index to read the position of each particle and adjust their positions to avoid overlap.
5. Adjusting Particle Offsets:
   • Apply an offset to the second particle using the Lerp function to make sure both particles are spaced out.
   • The Lerp function will blend between the two particle positions based on the index (0 or 1).
6. Adding Sine and Cosine Waves:
   • Duplicate the setup for additional particles and use Sine and Cosine waves for more dynamic movement.
   • Animate the position of the particles along different axes (X and Z).
   • Experiment with different values to get various animation effects, like spirals and waves.
7. Using Sphere Location for Particle Generation:
   • Use a Sphere Location module to generate particles randomly from a sphere, adjusting the radius to create diverse patterns.
   • Increase the number of particles and use GPU simulation for smoother results.
8. Enhancing the Effect:
   • Add Curl Noise to add randomness to the particles and make the trail look more natural.
   • Adjust the Size and Color curves to make the effect more dynamic and eye-catching.
9. Creating Multiple Rings:
   • Duplicate the particle system multiple times and rotate them to create multiple rings.
   • Use a Niagara Parameter Collection (NPC) to control the parameters globally for all particles.
   • Link the Angle, Distance, and Offset parameters to the NPC to make global adjustments.
10. Final Adjustments:
    • After creating the rings, adjust the parameters like Angle, Offset, and Distance to fine-tune the look of the trail.
    • Add extra parameters for the Trail Period and Trail Angle to control the overall behavior of the effect.

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Conclusion:

• The tutorial wraps up by showing how to adjust parameters like Angle, Trail Time, and Offset to get the desired trail effect.