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Anti-aliasing Filters & Sampling

All CGI images are made of fundamental building blocks called pixels. a pixel is the smallest breakdown of an image, and can only be made of one one color. When an image is rendered, the renderer needs to assign a single color to each pixel of the overall image depending on what object that pixel represents. This standard process brings up some problem as to what we call aliasing. where thin lines or diagonal lines are present in an image. To overcome this entire thing, we use a process called Anti-Aliasing. Here each pixel is multi-sampled i.e each pixel is broken down into multiples smaller parts which equals to more color information and then all the samples are averaged out using a Anti-alias filter, so as to obtain the final one color per pixel value.