Pixel Dissolve Material in UE5 Tutorial

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Hi guys, I’m Asif Ali, and you’re watching CGHOW. In today’s video, I’ll show you how I created this pixel dissolve effect in UE5. I’ll walk you through some key parameters like pixel scale, edge color boost, and panning. You can even animate the dissolve for added effects!

Before we dive in, don’t forget to subscribe to my channel and hit the bell icon to get notifications about new tutorials. If you like this video, please like, share, and comment. Let’s get started!

[Step 1: Parameter Setup]
Here, we have a few key parameters for this effect:

• Contrast: This defines the thickness of the dissolving pixels. If I decrease the contrast, the pixels get thicker, and if I increase it, it turns into a thin, sharp dissolve.
• Dissolve: This controls the overall dissolve effect of the material.
• Edge Boost: Adjust this to increase or decrease the intensity of the edge color. I prefer it at a moderate intensity.
• Pixel Size: Increasing the pixel size will make it more blocky, while decreasing it will give a finer pixelated effect.
• Offset (X, Y): Adjust the pixel offset in the X and Y direction.

[Step 2: Create the Material]
Let’s create the material from scratch.

1. Texture: For this effect, we’ll use a texture with both base color and opacity. To create the dissolve effect, we’ll use a mask with the texture.
2. Pixelation: To make the texture pixelated, we’ll multiply the texture coordinates and apply the floor function. This will break the texture into individual pixels. You can adjust the pixel size by modifying the value in the parameter.For example, setting the value to 5 will give a larger pixel effect. You can try different values like 20, 50, or 10 to see the effect.

[Step 3: Radial Dissolve Effect]
Now, let’s add a radial dissolve effect.

1. Texture Coordinates: We subtract 0.5 from the texture coordinates and calculate the length. This creates a radial dissolve pattern. You can tweak the subtraction value to control how the dissolve erodes from the center.
2. Dissolve Parameter: We’ll create a parameter for the dissolve, which controls how the texture dissolves outward.

[Step 4: Edge Coloring
To highlight the edges, we’ll use a contrast adjustment:

1. RGB Masking: The edge color should be green (set the red and blue channels to zero). This will highlight the edges of the dissolving texture.
2. Edge Boost: Multiply the edge color with the same texture and apply the boost edge parameter to intensify the edge effect.

[Step 5: Animation]
To animate the dissolve effect, we can use a sine wave combined with a time-based function. This will allow the dissolve effect to progress and reset smoothly. If you want to speed up the dissolve, multiply time by a parameter value and use absolute values to avoid negative results.

[Step 6: Final Tweaks]
Adjust the texture coordinates to fine-tune the animation, and you can offset the dissolve with an added vector for control over the direction.

[Conclusion]
That’s how we create this pixel dissolve effect. In the next tutorial, I might show how to integrate this effect into a Niagara particle system, where the dissolving pixels emit particles for even more dynamic effects! Stay tuned for that!

Thanks for watching, and remember—keep learning and keep creating. Until next time, bye!