Yours can be larger or smaller, it doesn't much matter. For this example, I've created an image with 256x256 pixels. We'll be creating two textures for this example (one for the shape of the decal, and one for the colours), however it is possible to create a decal with just one texture for the alpha cutout only and generate the colours inside the Unreal material, but this is fairly advanced and will not be covered here.Ĭreate a new file. I'll be using Photoshop for this example, but it doesn't really matter what tool you use as there are no strange formats or scripts used for making decals. This has the advantage of scaling a lot better to different sizes, but suffers when it comes to hard corners. We achieve this by using Distance Fields instead of hard edges to define shapes. Yet, if you have a look at the decals in-game, you'll be hard-pressed to find any jagged edges. img src from the linked Valve Siggraph paper by Chris GreenĪll the decals used in vanilla Automation are some variant of 256x256 pixels, so they aren't particularly high-resolution. Right: the distance-field alpha testing technique we'll be using here. Center: that same texture alpha-tested in-game. Left: source image with anti-aliasing and compression.
