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Tutorial: How to Create a Radar Effect in Unreal Engine Niagara VFX

[Intro]
Hi guys, I’m Ashif Ali, and you’re watching CGHOW. Don’t forget to subscribe and click the bell icon to get notifications for all my new videos. In this tutorial, we will create a radar effect from scratch using Unreal Engine’s Niagara VFX.

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Step 1: Create a Ring Material

• Objective: To create the base ring for the radar effect.
• How:
  • Start by creating a radial and subtracting another radial to form a ring.
  • Adjust the radii to control the thickness.
  • Connect a color to the material to define its appearance.
  • Set up dynamic parameters for Radius 1, Radius 2, Density 1, and Density 2.

Step 2: Set Up Niagara Emitter

• Objective: Create a Niagara emitter with one particle.
• How:
  • Use a burst of one particle and set the size to 100.
  • Apply the ring material to the particle, adjusting its density and sharpness.

Step 3: Custom Alignment and Facing

• Objective: Ensure the particles align to the z-axis.
• How:
  • Use the custom alignment and set the facing vector to the z-axis.
  • Adjust the width to control how the particles expand.

Step 4: Add Multiple Particles

• Objective: Create multiple instances of the radar ring.
• How:
  • Multiply the size and adjust the execution index to manage the positioning of each particle.

Step 5: Create the Line Materials

• Objective: Add vertical and horizontal lines to the radar effect.
• How:
  • Duplicate the ring material, modify it for line display, and adjust its thickness.
  • Set up dynamic parameters to randomize the rotation of these lines.

Step 6: Add Background and Base

• Objective: Create a darker background material for the radar.
• How:
  • Duplicate the previous material and adjust the size and color for the base.

Step 7: Create the Indicator

• Objective: Add an indicator to the center of the radar.
• How:
  • Duplicate the ring material and mask out the radial coordinates to form a small dot in the center.
  • Use a dynamic parameter to fade it in and out.

Step 8: Add a Target Emitter

• Objective: Add a moving target that will represent points on the radar.
• How:
  • Use a “Slender” shape for the target and adjust its radius and particle size.
  • Apply a red color and make it fade in and out.

Step 9: Create Rotating Trail Effect

• Objective: Add a rotating trail to represent the radar sweep.
• How:
  • Use the Taurus shape to create a rotating line.
  • Adjust the rotation speed to match the radar sweep.

Step 10: Final Adjustments and Effects

• Objective: Fine-tune the effect to match your vision.
• How:
  • Increase the spawn rate for more particles and ensure everything rotates properly.
  • Use the angle and dynamic parameters to offset the positions.

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[Conclusion]
This is a basic radar effect using Unreal Engine Niagara VFX. It’s a great starting point for creating more complex radar or scanning effects. I hope you learned something new today.

Thanks for watching! Keep learning, and I’ll see you in the next tutorial!