Artifact

Keywords: Artefact

An artefact is a glitch or a problem that can be caused by a multitude of issues. It's common to call a visual hiccup an artifact. An example would be a shadow artifact where sun shines through a solid wall. It could also be a compression artefact seen in a Jpg image or a small video file.

Artifact and Artefact are both correct spellings that can refer to the things you pick up in Tomb Raider or the blocky videos you can get when watching a twitch stream of Tomb Raider.