Stardew Valley: Best preferences.xml for Ultra-Wide Fix

While Stardew Valley technically supports ultra-wide resolutions natively, users on 3440x1440p or 5120x1440p often face a “rendering ceiling.” The game engine (XNA/MonoGame) has a hard limit on texture sizes ($4096 \times 4096$). If your resolution multiplied by your zoom factor exceeds this, the game may fail to render the edges of the map correctly. By tweaking the startup_preferences and potentially your save’s zoomLevel, we can force a stable aspect ratio and fix UI positioning.

File Path

Stardew Valley doesn’t use a single “preferences.xml” for everything. Instead, the startup behavior is governed by startup_preferences, while specific zoom levels are stored in each individual save file.

• Startup Preferences: %appdata%\StardewValley\startup_preferences
• Save File (Zoom Levels): %appdata%\StardewValley\Saves\[CharacterName_ID]\[CharacterName_ID]

Technical Note: These files are formatted in XML. Use Notepad++ or a similar code editor to ensure the structure remains intact.

Optimized startup_preferences Modification

To ensure the game launches correctly in ultra-wide without defaulting to a windowed 1080p state, locate and modify these tags:

XML Tag	Recommended Value	Technical Purpose
<windowMode>	0	Forces Fullscreen Exclusive to prioritize GPU scaling.
<fullscreenResolutionX>	3440 (or native)	Sets the horizontal pixel count for the render canvas.
<fullscreenResolutionY>	1440 (or native)	Sets the vertical pixel count.
<preferredResolutionX>	3440	Prevents the game from resetting to 16:9 on startup.
<preferredResolutionY>	1440	Matches the vertical aspect.

The “4096 Pixel” Fix: Balancing Zoom and Resolution

For GameEngineer.net readers on Super Ultra-Wide (32:9) monitors (e.g., 5120×1440), you cannot set your zoom level below 85-90% without hitting the XNA render limit, which causes black bars.

1. Open your save file (the one without the _old suffix).
2. Search for the <zoomLevel> tag.
3. Calculate the threshold: $\text{Width} \div \text{Zoom Level} \leq 4096$.
4. For 5120px widths, your minimum stable zoom is approximately 1.25 (125%). Setting it to 0.75 (75%) will break the rendering engine.
5. Set <zoomLevel>1.0</zoomLevel> for the most stable ultra-wide experience.

HowTo: Fixing UI Scaling and Aspect Issues

If your UI elements (hotbar, clock) are floating too far from the corners or overlapping, follow these steps:

1. In-Game UI Scale: Set the “UI Scale” independently from the “Zoom Level” in the Options menu. For 1440p Ultra-wide, 100% UI Scale and 85-90% Zoom is usually the “sweet spot.”
2. Delete Startup Preferences: If the game crashes on launch after switching monitors, delete the startup_preferences file entirely. The game will regenerate it based on your current display’s native EDID.
3. High DPI Override: Right-click Stardew Valley.exe > Properties > Compatibility > Change high DPI settings. Check “Override high DPI scaling behavior” and select “Application.” This ensures Windows doesn’t try to “stretch” the 2D sprites.
4. SMAPI “Zoom Level” Mod: For users who want to go beyond the 75% limit on ultra-wide, the “Zoom Level” mod allows for sub-75% zooming, though be prepared for visual artifacts at the map edges.

Technical Explanation: XNA Texture Limits and Coordinate Mapping

Stardew Valley is built on the XNA Framework (now updated to MonoGame in version 1.6+). XNA utilizes a “HiDef” graphics profile that caps individual texture surfaces at $4096$ pixels. When the game renders a frame, it creates a “Target Buffer.” If you are on an ultra-wide screen and zoom out too far, the game tries to map a world area larger than $4096$ pixels onto your screen. Since the engine cannot create a vertex buffer larger than its limit, it simply stops rendering, resulting in black bars on the right and bottom edges. Adjusting the startup_preferences ensures the initial buffer is created correctly, but the internal zoomLevel in the save file is what dictates if you hit that engine-level ceiling.