Liquid On Screen Effect

by Devon O.· February 24, 2019· in Shaders, Unity3D· 0 comments tags: liquid
I really wasn’t sure what to call this Unity3D post processing effect, but it’s a pretty nice one that creates a splash of liquid across the screen. It could be used in racing game when driving through a puddle, a boating game at any time, change the color to red and you’ve got a nice blood or lava splash, or easily modify it to have liquid dripping down the screen for rainy scenes, etc. etc. Just to have an idea of what I’m talking about, you can check out a WebGL example here – just click on the Unity scene to trigger the effect. If it seems useful, I’ll try to describe it below. The effect starts with a particle system, so we’ll create that first. Start with a circular texture (say, 128×128) with a red/green normal map. Feel free to use the one here for simplicity’s sake. I know it looks pretty weird, but we’ll use those colors later to create a faky refraction effect you typically find in water drops. Create a new material using an alpha blended particle shader and set that texture as the material’s particle texture. In your Unity scene create a particle system using […]
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Dissolving Particles with Custom Vertex Streams

by Devon O.· February 03, 2019· in Shaders, Unity3D· 0 comments tags: particles
Here’s a quick little tip/idea to demonstrate using custom vertex streams and custom data in your Unity3D Particle Systems to create some pretty interesting VFX such as dissolving particles. Doing some googling, there didn’t seem to be a lot of information out there about custom data in particle systems, so hopefully this will help out a little. From a high level, what this entails is creating a particle system that will automatically send some data to the shader of the particle material via the shader’s vertex stream. So, as you might guess, the first thing we’ll need is a shader that will be able to handle the data sent. Even sooner, though, let’s get a couple textures together. For the particle we can just use a basic particle png that has a radial gradient that goes from white in the center to full full alpha along the outer edge. We’ll also need a dissolve texture, which in this case can just be some quick perlin noise. You can make both in Photoshop or Gimp in about 5 minutes or just nab them here if you’d like to just try this out quickly. Of course, since the effect we’ll be looking […]
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Devon O. Wolfgang

AIR | Unity3D | AR/VR

Unity Certified Developer

Technical Reviewer of “The Essential Guide to Flash CS4 AIR Development” and “Starling Game Development Essentials”

Reviewer of “The Starling Handbook”

Unity Engineer at Touch Press.

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