project-1563653

GlymeraCanvas

Bring external images into your world and put them on a wall. Drop a picture in a folder or paste a direct image link, place a few blocks, and the image appears in-game — and everyone sees the same picture.

Don't miss my other exciting projects — take a look at GlymeraCraft's Profile Discord: https://discord.gg/s5NRFWfxgy

GlymeraCanvas is an admin tool, made for things like info boards, rules, maps, event posters or artwork at spawn.

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⚠️ Important: the 1024-block limit

GlymeraCanvas ships a fixed pool of 1024 image-slot blocks. Every image you place is cut into 32×32 tiles, and each tile occupies one slot from that pool.

That means: an admin can have at most 1024 image-blocks placed at the same time, across the whole server.

• A small 1×1 image uses 1 slot, a 3×3 image uses 9 slots, a 9×9 image (the max per image) uses 81 slots.
• Identical tiles are deduplicated — if two images share the exact same 32×32 tile, it only costs one slot. Solid-color borders, repeated patterns, or placing the same image twice are cheap.
• When you remove a canvas (/canvas remove or by breaking a block), its slots free up immediately and can be reused for new images.
• If you try to place an image when not enough slots are free, you get a clear message telling you how many slots are still available — nothing is placed.

So you are not limited in how many images over time, only in how many distinct tiles are placed at once — and that ceiling is 1024.

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How to use it

1. /canvas give — get a stack of Canvas blocks.
2. Build them into a rectangle on a wall (up to 9×9).
3. Look at the rectangle and run /canvas set <url-or-filename>.

The Canvas blocks turn into the image. Done.

Two ways to provide an image

By link — a direct image URL (must point at the image itself, not a web page):

/canvas set https://example.com/picture.png

By file — drop the image into the plugin's image folder and use just its name:

mods/de.glymera_GlymeraCanvas/images/

/canvas set logo.png

The file extension is optional — /canvas set logo finds logo.png automatically. No server restart is needed after adding a file.

Supported formats

PNG, JPG and GIF work out of the box. WebP/AVIF are supported if ffmpeg is available on the server (configurable); if it isn't, you'll get a clear message and PNG/JPG keep working. No third-party libraries are bundled.

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Commands

Command	Description
/canvas give	Get a stack of Canvas blocks
/canvas set <url|file>	Fill the Canvas blocks you're looking at with an image
/canvas remove	Remove the canvas you're looking at (frees its slots)
/canvas list	List placed canvases and slot usage
/canvas info	Info about the canvas you're looking at
/canvas reload	Reload the config

All management commands are OP-only by default.

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Good to know

• The 1024 slot blocks are hidden from the creative inventory. Only the single Canvas block shows up — so your block list isn't flooded.
• No flicker while viewing. Images are registered server-wide and loaded normally when a player joins; they stay stable. The only brief visual refresh happens at the exact moment an admin runs /canvas set (so build your boards before players arrive, and they'll never notice).
• Cheap to load. All idle slot blocks share one tiny placeholder texture, so the 1024 blocks add only a small one-time download for a brand-new client; after that everything is cached.
• Everyone sees the same image — content is registered globally, not per player.
• Persistent. Placed canvases survive server restarts.
• No phone-home. The only outbound traffic is fetching the exact image URL an admin asks for. Local files never leave the server.

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Configuration

mods/de.glymera_GlymeraCanvas/config.json

Key	Default	Meaning
poolSize	1024	Number of image-slot blocks (fixed by the asset pack — see the limit section above)
requireOp	true	If true, only OPs may manage canvases
ffmpegPath	"ffmpeg"	Path to ffmpeg for WebP/AVIF decoding; set to "" to disable

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Requires Hytale Stable-5 or newer.