Subnautica
21:9
Native
32:9
Partial
Gameplay Scaling
Hor+
HUD
Edge-positioned
Centered HUD
Native
Cutscenes
Ultrawide
Menus
16:9
FOV
Correct
Black Bars
None
Flawless Widescreen
Not Required
Community Fix
Available
Online Safety
Safe
Overview
Subnautica handles standard 21:9 well: gameplay uses a real Hor+ field of view, and the helmet HUD is functional, though the hunger/thirst/oxygen bars sit at the edges and look slightly stretched until you cycle HUD modes with F6. At 32:9 the picture fills the screen with no black bars, but community reports describe UI elements clipping unless you manually lower the UI Scale slider — no dedicated fix or mod exists, just trial-and-error with the native scale setting.
Compatibility details
21:9 SupportNative
32:9 SupportPartial
Gameplay ScalingHor+
HUD BehaviorEdge-positioned
Centered HUDNative
Cutscene SupportUltrawide
Menu Support16:9
FOVCorrect
Black BarsNone
StretchingUI only
Fixes
Recommended fix
In-game UI Scale slider + F6 HUD-mode cycle
UltraWideCheck links to third-party mods and tools but does not host or distribute mod files.
Community reports
3440×1440
Working
Full FOV, no black bars; pressed F6 once to fix stretched hunger/thirst bar look.
May 20, 2026
5120×1440
Working with fix
Playable and no black bars, but had to drop UI Scale to ~80% to stop the PDA and inventory panels from clipping off the bottom edge.
Mar 2, 2026
Patch history & verification
live buildSep 18, 2026
Verified via Steam Community discussions — 21:9 gameplay uses real Hor+ FOV; 32:9 works but needs manual UI Scale adjustment to avoid HUD clipping.