---
name: Diegetic interface
slug: diegetic-interface
category: pattern
status: published
created: 2026-08-21T00:00:00.000Z
modified: 2026-08-21T00:00:00.000Z
definition: An interface that exists inside the fiction it serves, so the
  character can see and use it too, rather than being drawn on top of the world
  for the player alone.
aliases:
  - name: diegetic UI
  - name: in-world UI
  - name: non-diegetic UI
  - name: meta UI
  - name: spatial game UI
tags:
  - illustration
relations:
  contrastWith:
    - fictional-user-interface
    - interface-metaphor
  variantOf: []
  partOf: []
  seeAlso: []
implementations: []
sources:
  - title: "TV Tropes: Diegetic Interface"
    url: https://tvtropes.org/pmwiki/pmwiki.php/Main/DiegeticInterface
  - title: "Types of UI in gaming: diegetic, non-diegetic, spatial and meta"
    url: https://medium.com/@lorenzoardeni/types-of-ui-in-gaming-diegetic-non-diegetic-spatial-and-meta-5024ce6362d0
  - title: "Nasty Rodent: diegetic and non-diegetic UI"
    url: https://nastyrodent.com/diegetic-and-non-diegetic-ui/
demo: inline
exhibit: false
useWhen: the readout belongs to the world, not the screen
---

"Diegetic" is borrowed from film theory, where it separates sound that exists in the story
(a radio the characters can hear) from sound that does not (the score). Applied to
interfaces it asks one question: does this readout exist for the character, or only for the
player? An ammunition counter printed on the side of the gun is diegetic. The same number
floating in the corner of the screen is not. The canonical example is Dead Space, where
health is a row of segments on the suit's spine and the inventory is a hologram the
character projects, so the screen never has to be covered to be understood.

The word comes as part of a set, from Erik Fagerholt and Magnus Lorentzon's 2009 thesis,
which sorts interfaces on two axes: whether the element belongs to the fiction, and whether
it sits in the world's geometry. That gives four types, and the other three are the aliases
people reach for when they mean "not this one". **Non-diegetic** is in neither: the
classic screen-space HUD, drawn flat over the picture, for the player alone. **Spatial**
sits in the world's geometry but outside the fiction: the highlight around a lootable
object, the waypoint marker on the ground, things the character cannot see but that respect
the perspective. **Meta** is inside the fiction but not in the geometry: blood spattering
the camera, rain beading on the lens, damage that reads as happening to the character rather
than to the screen. Most games use all four at once, and naming them separately is what lets
a team argue about one element without relitigating the whole screen.

The appeal is immersion, and the cost is legibility. A counter that respects perspective can
be at an angle, in shadow, or behind the character's own arm, which is why diegetic designs
lean on shape and colour more than on small numbers, and why they usually keep one
non-diegetic fallback for the information that must never be missed. There is an
accessibility dimension too: a readout that only exists when the camera is pointing the
right way is unavailable to a player who needs it constantly, so the best implementations
treat the diegetic version as the default presentation of a fact the game can also state
plainly.

A [fictional user interface](/fictional-user-interface) is the related craft and not the
same claim: a FUI is an interface designed to be *watched*, most often in film, and it may
be pure spectacle with no state behind it, while a diegetic interface is judged by whether
the player can play through it. Distinguish it also from a [HUD panel](/hud-panel), which
is a real product's floating readout: the panel is a genuine control surface for a real
person, whereas a non-diegetic HUD is the fiction's version of that same idea, borrowed by
games from cockpits and now borrowed back by products.