Dynamic Wallpapers

Set per-note background wallpapers in Obsidian using frontmatter properties. Wallpapers can be inherited from linked notes, browsed in a gallery, or randomized from any combination of inheritance tiers.

• 🖼️ Per-note wallpapers: Set a wallpaper frontmatter property linking to an image in your vault
• 🔗 Wallpaper inheritance: Notes without a wallpaper can inherit from linked notes (via a specific frontmatter property, all frontmatter links, body links, or backlinks)
• 🎨 Wallpaper picker: Browse and select wallpapers from a visual gallery with thumbnail previews
• 🎲 Random wallpaper: Pick a random wallpaper from the active note's backlink pool, or from the full set of related wallpapers
• 🗂️ Related wallpapers modal: See every wallpaper that could apply to the active note, grouped by which inheritance tier produced it
• 🧹 Thumbnail cache management: Clear or rebuild the cached thumbnails that power the picker and related-wallpapers modal
• 🌗 Overlay opacity: Adjust a color overlay per theme (light/dark) so text remains readable
• ↔️ Flip wallpaper: Horizontally flip the current wallpaper image
• 📌 Set wallpaper to note: Save the currently displayed wallpaper into the active note's frontmatter
• 🔒 Keep existing wallpaper: Optionally retain the wallpaper when navigating to notes without one

Desktop-only. This plugin uses Node.js fs APIs, which are not available on Obsidian Mobile.

Commands

All commands are available from the Command Palette (Cmd/Ctrl + P).

• Choose Wallpaper: Open a visual gallery of every image in the Wallpapers Directory and click a thumbnail to apply it.
• Pick Random Wallpaper: Apply a random backlink's wallpaper (resolved through the full inheritance chain), skipping the one already on screen.
• View Related Wallpapers: Open a modal listing every wallpaper that could apply to the active note, grouped by inheritance tier.
• Pick Random Related Wallpaper: Apply a random wallpaper from the related set only, skipping the one already on screen.
• Increase Overlay Opacity: Raise the active theme's overlay opacity by 0.05.
• Decrease Overlay Opacity: Lower the active theme's overlay opacity by 0.05.
• Set Current Wallpaper to Note: Write the wallpaper currently on screen into the active note's frontmatter as a wiki link.
• Refresh Wallpaper: Re-run the full wallpaper resolution pipeline for the active note.
• Clear Thumbnail Cache: Delete every file in the plugin's .cache directory.
• Rebuild Thumbnail Cache: Wipe the cache and regenerate a thumbnail for every image in the Wallpapers Directory.
• Flip Current Wallpaper (Horizontal): Mirror the current wallpaper image in place (overwrites the source file — no undo).

Related wallpapers & inheritance

A note doesn't have to set its own wallpaper. When the active note has no direct wallpaper frontmatter property, the plugin resolves one by following the note's links — so a wallpaper set on one note can cascade to everything connected to it.

Resolution order

The plugin walks these tiers in order and applies the first wallpaper it finds (first match wins):

1. Direct — a wallpaper set on the active note itself via the configured Wallpaper Property.
2. Inheritance Property — frontmatter outlinks of the property named in Inheritance Property (e.g., an areas: list).
3. Frontmatter Links — every other wiki link found anywhere in the frontmatter.
4. Body Links — wiki links in the note body, with the last link checked first.
5. Backlinks — notes that link to the active note. Each backlink is resolved through its own priority chain; the first backlink that yields a wallpaper wins.

Tiers 2–5 can each be toggled off in Settings. A backlink of a backlink (transitive backlinks) is not followed — only direct backlinks of the active note are checked.

The "related" set

The related set is the full collection of wallpapers reachable through every enabled tier above, deduplicated by resolved file path. Two commands operate on it:

• View Related Wallpapers opens a modal listing every wallpaper in the set, grouped by the tier that produced it. Each card shows a thumbnail, the source note's name, and its tier. Click a card to apply that wallpaper; click the small ↗ source-name link to open the source note in a new leaf instead. Tiers with no wallpapers are hidden.
• Pick Random Related Wallpaper applies a random wallpaper from this same set, skipping the one already on screen. Unlike Pick Random Wallpaper (which only considers backlinks), it never falls back outside the related set.

Settings

For how the inheritance settings interact, see Related wallpapers & inheritance above.

Supported image formats

The wallpaper picker, related-wallpapers modal, thumbnail cache, and random-pick commands only recognize: png, jpg, jpeg, webp, gif, bmp, and svg. Files with other extensions are silently skipped.

Filesystem Disclosure

This plugin accesses the filesystem beyond what Obsidian's standard vault APIs provide:

• Thumbnail cache - Creates a .cache directory inside the plugin's own folder (<vault>/.obsidian/plugins/dynamic-wallpapers-plugin/.cache/) to store generated wallpaper thumbnails (480×270 cropped JPEGs). Thumbnails are generated from the original images via the browser's built-in canvas + createImageBitmap APIs — no external binary is required. No files outside the vault are created.
• Node.js fs APIs - Used for reading/writing thumbnail cache files. All file operations stay within the vault directory.

Contributing

See CONTRIBUTING.md for how to set up a local dev environment, including symlinking the build/ output into your vault and using the Hot-Reload plugin for fast iteration.

See AGENTS.md for project conventions and style guidelines.