Material Cleaner Mini 0.1.1 · bashpacks (Rimas Albert) · GPL-3.0-or-later. Separate paid standalone product; Pro is not required or bundled. Support: Contact the creator on this product page.

Install

1. Download material-cleaner-mini-0.1.1.zip. Don't unzip it.
2. In Blender open Edit → Preferences → Add-ons.
3. Open the ⌄ menu at the top right and choose Install from Disk…, then pick the ZIP.
4. Tick Material Cleaner Mini to enable it.

Open it

Click Material Cleaner in the top bar (right after Help), or press Ctrl+Shift+M in any editor. A small popup opens and scans the file straight away. Scanning never changes anything. If the file changed since the last scan, the popup rescans when it opens; the ⟳ button rescans any time.

Read the findings

Each row is one kind of problem, with a button to fix it. Click a row's title to see every item it will change before you press anything.

• Red: missing texture files
• Orange: duplicate images and duplicate materials
• Yellow: data maps tagged sRGB, textures over 4K, renamed duplicates
• Grey: unused material slots and orphan materials/images

Fix the safe ones

Fix N safe issues runs, in this order: merge duplicate images (same file, color space and alpha) → merge identical materials → remove unused slots and orphans. It all happens as one undo step, so Ctrl+Z restores everything. Each fix touches only what its row listed.

The ones that need you

Color-space Fix: a separate confirmed action, excluded from the safe batch. Changing a shared image to Non-Color also changes uses in World, compositor and Geometry Nodes. Review those uses before confirming.

• Relink (missing textures): choose a folder. Mini searches it and its subfolders for the missing filenames and points the images at what it finds.
• Reduce (textures over 4K): pick 1K, 2K or 4K. Mini makes smaller packed copies and switches the material to them. This lowers detail; Ctrl+Z restores the originals before you save.
• Review (renamed duplicates): materials with identical content but different names. After you confirm, users are moved to the most-used one.

Good to know

• Materials and images linked from other .blend files are never merged or removed.
• Memory values are estimates of decoded texture size, not measured RAM or VRAM. PNG and JPEG sizes are read from the file header; EXR/HDR/TIFF sizes are counted once Blender has loaded them.
• Materials merge only when nodes, settings and textures are identical.
• Before a big cleanup on an important file, save a copy first.