The questions every operator asks.

Yes, and it's one of the main things the mod is for. Filament is denominated by tier, not by item, so a spool doesn't remember what you wound into it. Anything of the same tier is interchangeable, and a spool also pays for anything below its tier.

Wind sculk (Tier 5) and print diamonds (also Tier 5). Wind your surplus copper (Tier 2) and print gold. Drop the target item into the printer's Smart Print Slot to put it in Item Mode, and it prints copies paid for out of the spool.

The one thing you can't do is convert upward. Low-tier filament contributes nothing toward a higher-tier cost, so no amount of cobblestone will ever add up to a diamond.

Not Printable means the machine will never print that item:

• It has no Filament Unit value and you're in strict mode (the default), so un-priced items can't be printed.
• It's a filament spool or a restricted trophy: the printer never duplicates those.
• It's wind-only treasure: saddles, name tags, wither skulls, and the dragon egg recycle into Filament Units at the Winder but never print back.

A material that's simply above the machine's tier (e.g. Tier 3 string in a Tier 2 printer) shows Requires a Tier N Printer instead; just use a higher-tier machine. To price unknown blocks, set unknownBlocksPrintable=true in the config.

If the status says No Region Set, the machine isn't refusing an item at all: it's in Deconstruct Mode without an armed region. Toggle the GUI's Mode button back to Print, or hand it a scanner selection. A machine that has printed something arms an un-print of that build instead, and reads Ready: Un-print.

For a structure print, the machine doesn't refuse the whole job over a few bad blocks. It skips any block it can't print (too high a tier, or un-priced) and builds everything else.

Only an item print, or a structure where nothing is printable, shows Not Printable outright.

Use the X / Y / Z offset steppers in the printer GUI. They shift the build area relative to its default position (centered directly above the printer). Each axis is capped at ±32 blocks, enough to place a build beside or above the machine without printing into the printer itself.

The Rotate button spins the whole print 90° clockwise per tap (0 → 90 → 180 → 270). Everything turns with it: a north-facing door comes out facing east. Rotation pivots around the build's center, so your offsets are never touched, and the ghost preview updates live so you can line it up before you print.

Auto defaults OFF. With Auto off, loading a disc only arms the printer (Ready). Press Start (or pulse redstone) to begin. A manual Start prints one item, or runs one structure job.

Flip Auto ON and the printer starts the moment a printable disc or item lands, and keeps going. If a print began on its own, Auto is on.

Craft one: an Extrudium Crystal plus a Book, shapeless. Or run /mc3dprint guide, which hands you a fresh copy and can be run by any player, since the Handbook is documentation rather than loot.

The mod gives you the book automatically the first time you craft a printer or pick up a Blueprint Disc, but only once per player, so losing it used to leave you stuck. Operators can hand copies to other players with /mc3dprint guide <players>.

What does not work is /give-ing the book directly. The Handbook is a Patchouli book, so its item id is patchouli:guide_book, not an mc3dprint: one, and a plain give produces an unbound copy that reads "Invalid book: no ID defined". Without Patchouli installed there is no book at all; the mod works fine, you just read the guide here on the site instead.

Yes, the mod ships two optional built-in styles: Blueprint Mode (every machine as its own schematic: blueprint blues and white line-work) and Dark Mode (matte near-black, glow and tier colors stay loud).

Enable one under Options → Resource Packs: move MC3DPrint: Blueprint Mode or MC3DPrint: Dark Mode to the Selected side and click Done. Move it back to return to the default art. Each release also attaches the styles as standalone resource-pack zips. Details in the Alternate styles guide page.

Two ways:

• Scan your own builds with the Structure Scanner: right-click two opposite corners, then scan with a Blank Blueprint Disc anywhere in your inventory.
• Find curated discs in structure chests and archaeology finds, modded ones included: print what you find, no scanning required. By default loot won't hand you a build you already have.

Server operators can also import .schem / .litematic / .nbt files with /mc3dprint import. In Creative, a config toggle (allowAllDiscsInCreative) lists every curated disc the mod ships.

A few curated builds are cross-mod: the six-ride Coppertide Park set is built from MC Waterslides blocks and only shows up (creative and loot) when that mod is installed. Details on the Blueprint Discs page.

Yes. Every tier's print footprint is a config value: maxFootprint under each [tierN] section of mc3dprint-common.toml. The defaults run 3×3 (Tier 3) up to 51×51 (Tier 8), but you can raise any tier as high as 1000×1000 if you want a truly ludicrous print area. The same cap governs Deconstruct regions, and Build Too Large / Requires a Higher Tier statuses follow whatever you configure.

One caveat: a running print keeps its whole build area chunk-loaded until the job finishes, so giant footprints carry a matching server-performance cost.

Yes, it's an open bounty. Open any build in the gallery and use "Add a screenshot": paste a direct image link (imgur, catbox, etc.), add your handle, and submit. No GitHub account needed.

Every submission is reviewed before it appears: appropriate, on-topic shots get published on the build's page, in submission order, and credited to your handle in the repo. Builds without a screenshot yet show a "📷 Screenshot wanted" badge. You can send up to two per build per day, so there's no need to race to be first.

Each printer has upgrade slots that grow with its tier (Tier 3 has 3, topping out at 8 slots). Drop modules into those slots in the GUI, or Shift+Right Click them onto the machine.

Speed, Efficiency, RF Efficiency, and Buffer modules stack: Speed, RF, and Buffer multiplicatively (two Speed modules give 0.8 × 0.8 = 64% print time), Efficiency linearly (four modules reach exact 1:1 break-even, which needs a Tier 4 or higher machine to have the slots for them). You can install at most 4 of any one type.

The Redstone Module is the exception at 1 per machine. It has no numeric effect at all: it emits a full-strength signal from all six faces while the machine is printing or deconstructing, and nothing when the machine is idle or paused, so an inverted signal makes a stall alarm. See Upgrade modules for the full breakdown.

Check the status line. Every pause is recoverable, and the job resumes where it left off once you fix the cause:

• No Power: feed it more RF.
• No Filament: dock a fuller or higher-tier spool.
• Output Full: clear the bottom output slot.
• Spool Missing or Full: the deconstruct equivalent. The filament coming out of the next block has nowhere to go, so give it room at that tier, in a docked spool or a Filament Rack on the cable network. Nothing is ever voided.
• Obstructed: clear the build area. The printer never overwrites existing blocks; it only fills empty space.
• No Region Set: the machine is in Deconstruct Mode with nothing armed and no print to undo. Toggle Mode back to Print, or sneak-click it with a scanner selection (any casing works on a fabricator).