Glitch – is an unexpected error or malfunction in software that leads to incorrect operation or unusual behavior of the system. In the context of video games, glitches can cause unexpected visual effects, changes in game physics, unforeseen events, or allow players to gain unfair advantages. Video game glitches often become well-known among players and can be used in speedruns to shorten game completion times.
The most popular glitch is texture clipping.
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Glitches can occur not only in video games but also in many other fields. In electronics, glitches often manifest as brief malfunctions or anomalous signals in electrical circuits that can affect the operation of a device or system. For example, digital devices may suddenly display incorrect data or freeze due to glitches in software or hardware.
Glitches also occur in photography and video, where they can arise from processing errors, creating unexpected visual artifacts. These errors can be used as artistic elements, adding a unique style and atmosphere. Some applications allow users to intentionally add effects or filters to photos/videos that mimic glitches (for example, the VHS effect).
Despite the fact that glitches are often perceived as unwanted errors, in some cases they can be used creatively and add mood/vibe. Glitch is a broad concept that can occur in many fields.
Also, read the post about what a bug is. In short - a glitch is a random/temporary issue, while a bug is a permanent one.