Balloons in UE4.27 Niagara Tutorial | Download Files

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Balloons in UE4.27 Niagara Tutorial | Download Files
hi, guys today I have created his balloons setup in ue4 Niagara using mesh render and ribbons this is not the best ballons setup but sites a basic idea of how you can make this type of effect quickly.

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Hi guys, I’m Asif Ali, and you’re watching CGHOW. In today’s video, I’ve created a basic balloon setup in Unreal Engine 4.27 using Niagara. Let’s get started with this tutorial! [Music]

Before we dive into the setup, make sure to subscribe to my channel and hit the bell icon so you’ll receive notifications whenever I post new tutorials.

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Step 1: Setting Up the Balloon Emitter

• Start by creating a new particle system. Right-click and select Effects, then Fountain Test. This will be your balloon emitter.
• Initially, there’s just one balloon in the system. I’ll delete it and add one balloon to start with.
• Set the balloon to spawn only once with infinite lifetime and never die.
• Adjust the color to red and set the size to 200 units.
• Use Sphere Location to offset the spawn position to (500, 0, 0), which places the balloon in the air.
• To simulate the balloon rising, apply a slight upward velocity, but because the life is infinite, the balloon keeps rising until it’s out of view.

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Step 2: Adding the Spring for Thread Attachment

• To simulate the thread holding the balloon in place, apply the Spring module. This ensures the balloon is pulled back to its original position (500 units in the Y direction).
• Set the spring intensity (tightness) to around 50 for a more rigid setup. Adjust it to 2-5 for a more relaxed motion.
• The balloon now moves slightly up and down, mimicking a floating balloon.

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Step 3: Adding Random Movement with Curl Noise

• To make the balloon move randomly, add the Curl Noise module. This module causes the balloon to drift in random directions while still trying to return to the original position.

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Step 4: Creating the Balloon’s Thread

• Now, let’s add the thread to the balloon. Duplicate the emitter and name it “Thread”.
• Instead of particles, use a Ribbon module for the thread, and apply a basic Particle Color material.
• Delete unnecessary modules like Card Noise, Spring Force, and Velocity, then use the Beam Setup.
• Set the beam to spawn 100 particles with a Spawn Burst of 100.
• Adjust the Beam Width and Beam Update to create the thread’s effect.

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Step 5: Connecting the Balloon and Thread

• In the Beam Setup, you need to connect the thread to the balloon. Use the Dynamic Input to read the position of the balloon and set the end position of the thread accordingly.
• Offset the balloon’s pivot point if necessary to ensure the thread attaches properly.

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Step 6: Adding Curves to the Thread

• To make the thread look more realistic, add tangents to the beam setup. Use random vectors with a Sign module to make the thread move slightly as the balloon floats.
• Adjust the Period and Scale settings, and experiment with sine and cosine functions to create a natural curve in the thread.

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Step 7: Adding Multiple Balloons

• If you want to add more balloons, duplicate the Dynamic Input and adjust the index for each new balloon.
• For example, set the index for the second balloon to 1, and the third to 2. You can keep duplicating and adjusting the values for as many balloons as you want.
• You can also randomize the color of each balloon by adjusting the Particle Color in each emitter.

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Step 8: Preventing Balloons from Intersecting

• To prevent the balloons from intersecting, I created a system where each balloon checks its distance from the others. If two balloons are too close, a velocity is applied to push them apart.
• Using the Position Reader and the Execution Index, I subtract the positions of the balloons to calculate the distance.
• If the distance is smaller than a threshold (e.g., 2 units), the balloons are pushed away from each other with a random velocity.

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Conclusion: This is a simple balloon setup in Niagara that you can use for a variety of effects. The balloons are attached by threads, they move randomly, and there’s a basic collision system to keep them from intersecting.

Thanks for watching, and I hope you found this tutorial helpful. Keep learning, and I’ll see you in the next video!