Block Image Dumper

A Fabric client mod for Minecraft 26.1 that exports the game's rendered icons straight to PNG files — no manual screenshotting, cropping, or transparency cleanup.

• F7 — items. Writes every registered item's inventory icon as a clean, transparent 64×64 PNG (one file per item).
• F8 — decorations. Exports the overlays a flat icon can't capture: per-face decorated-pot sherds and tintable banner & shield pattern masks.

Why would I want this?

Data packs and resource packs that preview container contents — like the shulker-preview data pack — need a pixel-accurate image of every item exactly as it appears in the inventory, including block-type items that have no flat sprite of their own. Producing ~1,600 of those by hand is impractical. This mod generates the entire set in seconds, with correct transparency and decoration overlays, ready to drop into a build pipeline.

It has no dependency on any particular pack, though — it just writes PNGs you can use for atlases, wikis, web tools, or anything else.

How it works

Minecraft 26.1's screenshot path force-sets every pixel opaque, so transparency can't be read back directly. The mod works around this by rendering two icons side by side in a single frame and combining the captures:

• Items are drawn over black and over white; comparing the two reconstructs exact per-pixel alpha.
• Pots compare a plain pot against a one-sherd pot to isolate the sherd motif.
• Banners & shields render the pattern in white dye over a black base, so the brightness difference becomes a tintable white mask.

Usage

1. Install this mod alongside Fabric API.
2. Load any world, then press F7 (items) or F8 (decorations).
3. Find your PNGs in <minecraft>/block-images/.

Client-side only · MIT licensed · Source & releases on GitHub