Category: Theory

Raster and Vector are the two main categories of digital graphics.

Raster graphics are best used for photographs, scanned artwork or detailed graphics. Since they are pixel-based though they suffer image degradation.
When scaled up, raster images gets rough and jagged/pixelated.

Vector-based graphics are more versatile and easy to use. The most obvious advantage is that they are not resolution-dependent and are perfectly scalable with no image degradation.

As we already know, the raster format is resolution-specific. Therefore the images display at one specific resolution.
You measure the resolution of raster images in dpi or dots per inch. The higher the dpi, the better the resolution.
Better resolution, however, comes at a price in the form of large file size.

Unlike pixel-based raster images, vector graphics are based on mathematical formulas that define geometric polygonal primitives. Because of this, logos, UI elements, sprites and fonts best represent this format.

If you want to read more about digital graphics check out the post below, which talks about the difference between RGB and CMYK colour models.

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If you want to dive deeper check out these Skillshare courses covering the principles of raster graphics in Adobe Photoshop and vector graphics in Adobe Illustrator.

When designing anything in colour, the two most common colour models are RGB and CMYK. The latter is used for print meanwhile RGB is used for displaying on monitors.

RGB, which stands for the primary colours red, green, and blue, is known as an additive model. This means that colours are added together to make up what we see on the screen. CMYK, which stands for the colours cyan, magenta, yellow, and black, is a subtractive model.

These two models differ because of the type of media you use them for. For instance, say I designed some artwork in RGB with the intention to send the final result for print, the colours won’t be accurate and will vary from printer to printer.

Using the appropriate colour model in relation to what you plan on doing is crucial. If your plan is to display your work on a monitor use RGB if you are printing it, use CMYK.

If you want to read more about digital graphics check out my post below, which talks about the difference between raster and vector graphics.

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If you want to dive deeper into colour science in the visual effects field check out this FXPHD course.

If you are more into illustration, why not check out this Skillshare course about colour theory.