From the course: Unreal Engine: Lunchtime Lessons

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Optimize textures with channel packing

Optimize textures with channel packing - Unreal Engine Tutorial

From the course: Unreal Engine: Lunchtime Lessons

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Optimize textures with channel packing

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- [George] Hi, I'm George Maestri. Too many textures can bog down your Unreal Level. So, I'm going to show you a technique that allows you to pack more textures into one image. Now, the technique is called Channel Packing and it basically packs individual gray scale images, into the RG and B Channels of another image. So, before we actually do anything in Unreal, let's hop over to an image editor, I'm using Photoshop. Now, for this material, we're going to have a number of different channels. We have our Color Channel, which is going to stay the same and that's basically just this hex pattern. Then we have another channel here and we're going to use this for metallic. This is going to be our Specular Channel and this is going to be roughness. Now, each one of these is different, but they're all gray scale images. And that gives us the opportunity to place each gray scale into one of the R, G and B Channels of another image. So, we can do this simply by creating an image that's the…

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