voxel-it

voxel-it

Tools below are Pika MCP tools, named bare — call each under whatever prefix your session exposes for the Pika MCP.

One skill, one engine: turn a photo into a Minecraft screenshot where the human stays photoreal and the rest of the frame becomes voxel blocks, unified by a cinematic color grade. A Step 0 router reads the photo and picks one of three modes — deciding what gets voxelized (the featured object, the background, or everything except the person) and whether to float Minecraft "loot tags" naming the hero objects. This one skill absorbs both the old Minecraft-Food trend (object-only) and the old Minecraft-World trend (object+background).

The conversion engine is the @rohxit7 viral recipe, verbatim (Instagram, 194K likes, #minecraft #prompt #chatgpt). The object-only prompt and loot-tag clause are salvaged from the retired Minecraft-Food trend (@aibyjoe "Minecraft Food").

The effect, precisely:

1. Keep photorealistic & untouched — the PERSON (face, skin, hair, clothing, pose, proportions). No stylization, no blockifying — in every mode.
2. Convert to Minecraft — the parts the chosen mode targets (some subset of: terrain, structures, plants, objects, furniture, vehicles, food, drinks, sky, background): clean cubic/voxel geometry, crisp 16×16-style textures, modern-Minecraft-screenshot quality (premium SEUS/BSL shaders — realistic light, soft shadows, AO, volumetric light, sharp edges).
3. Spatial fidelity (strict): exact camera, framing, composition; every element in its original position and size; nothing added/removed/rearranged.
4. Cinematic color grade (the unifier): analyze the source mood and grade the whole frame to match, cohesive across real human + voxel world so it's one image, not a pasted cutout.
5. (Conditional) Loot tags — object-only mode only; see Step 0.

Identity note: maskless single full-canvas edit (per the recipe), so the face is regenerated and can drift slightly. Accepted for color cohesion. For a byte-perfect face, see the advanced mask note at the bottom.

Step 0 — Router: pick the MODE

Read the photo and commit to exactly ONE mode. State the decision as a single line — MODE: object-only / MODE: background-only / MODE: object+background — then apply the matching prompt block in Step 3. The engine, color grade, and quality bar are identical across modes; the only delta is what voxelizes and whether loot tags float.

The three modes:

• object-only — voxelize ONLY the held/featured object (food / drink / product) and its own tableware. Keep the PERSON and the BACKGROUND fully photorealistic. Float a Minecraft loot-tag label above each hero object. (This is the old Minecraft-Food look.)
• background-only — voxelize the BACKGROUND / environment into Minecraft blocks. Keep the PERSON photorealistic; if an incidental object is present, keep it photoreal too. No loot tags. (A person standing in a place, now in a voxel world — but anything they're holding stays real.)
• object+background — voxelize EVERYTHING except the person (the object AND the background). Loot tags optional. (The old full-voxelize Minecraft-World default.)

Decision tree (default detection):

Does the user EXPLICITLY ask to voxelize everything?
  ("voxelize everything" / "object and background" / "full voxel world")
    → MODE: object+background
Else, is a human FACE or BODY present?
    ├─ Person present + a held/featured object (food/product) is the subject?
    │     → MODE: object-only        (float loot tags on the object)
    └─ Person present, NO featured object (people-in-a-place shot)?
          → MODE: background-only     (the default for face-in-a-scene shots)
No person present?
    ├─ Pure object shot (a meal, a product, a flat-lay, a desk of gear)?
    │     → MODE: object-only
    └─ Landscape / scene with no featured object?
          → MODE: background-only
Genuinely ambiguous (can't tell if the object or the scene is the point)?
    → ask the user ONE line: "voxelize just the object, just the background,
      or everything but you?"

The routing intent: a face with no featured object defaults to background-only (put the person in a voxel world, keep them and anything incidental real). A featured object → object-only (voxelize the hero item, tag it, keep person + scene real). object+background only on an explicit request.

Inputs

• <source> — any photo (path, URL, or chat-pasted image). Works on object shots, person+object shots, and wide scenes alike.

Empty-args menu

1. "Drop the photo (path, URL, or paste it). I'll auto-pick the mode — object-only (voxelize just the food/product you're featuring, with Minecraft loot tags), background-only (voxelize the scene around you, keep you and anything you're holding real), or object+background (voxelize everything but you). Tell me if you want to force a specific mode."

(No provider question — always gpt-image-2; see Engine.)

Engine — always gpt-image-2

gpt-image-2, quality="high", output_format="png". It's the strong editor the recipe needs and commits the world to blocks. Do not use nano-banana-pro — it under-voxelizes (preserves subjects as photoreal even when told to block-ify), so the world barely changes (audited over a 6-scene batch).

Timeout gotcha: at quality="high" a synchronous call often exceeds the ~260s tool budget and the client times out. Always call with background:true and poll task_status(task_id) in a tight loop until completed.

Workflow

Working dir: <project>/voxel-it/<run-id>/ — each run its own folder.

Step 1 — Get the source as a Pika-CDN URL

• HTTPS URL? Use it directly.

• Local file? Upload (Step 2). Convert HEIC: sips -s format jpeg in.HEIC --out out.jpg — this strips the EXIF orientation flag, so the JPEG can land on its side. View it; only if it's sideways, rotate upright with sips -r 90 or sips -r 270 (whichever way it's tilted), then view again to confirm. The model bakes the reference pixels as-is, so it must be upright before upload.

• Chat-pasted image? Not reliably on disk. If the user names a file (e.g. a Desktop screenshot — macOS uses a narrow no-break space U+202F before AM/PM, so match via a glob), copy it. Otherwise extract from the session transcript:

  cd ~/.claude/projects/<project-slug>/
  SRC=$(ls -t *.jsonl | head -1)   # newest = current session
  python3 - "$SRC" "<run-dir>" <<'PY'
  import json, base64, sys, os, hashlib
  src, out = sys.argv[1], sys.argv[2]; imgs=[]
  for line in open(src):
      try: o=json.loads(line)
      except: continue
      m=o.get("message") if isinstance(o,dict) else None
      role=(m or {}).get("role") if isinstance(m,dict) else o.get("role")
      if role!="user": continue
      c=(m or o).get("content")
      if not isinstance(c,list): continue
      for p in c:
          if isinstance(p,dict) and p.get("type")=="image" and isinstance(p.get("source"),dict):
              s=p["source"]
              if s.get("data") and s.get("media_type","").startswith("image/"):
                  imgs.append((s["media_type"], s["data"]))
  # save the last N pasted images (newest turn). Adjust [-1:] to [-N:] for batches.
  for i,(mt,data) in enumerate(imgs[-1:], 1):
      b=base64.b64decode(data); ext={"image/webp":"webp","image/jpeg":"jpg","image/png":"png"}.get(mt,"jpg")
      p=os.path.join(out,f"source_{i}.{ext}"); open(p,"wb").write(b)
      print(p, len(b), "sha256", hashlib.sha256(b).hexdigest())
  PY
  

  Always read the saved file back (view it) before spending a generation.

Step 2 — Upload to Pika CDN

upload_asset({filename, mime_type, size_bytes, sha256}) → PUT the bytes to presigned_url with the exact content_type from the response (curl -X PUT -H "content-type: <type>" --upload-file <file> "<presigned_url>", expect HTTP 200) → use the returned public_url.

Step 3 — Run the edit (branch on the Step 0 mode)

generate_image_edit with provider="gpt-image-2", quality="high", output_format="png", background=true (poll), the CDN URL in images, and aspect_ratio: "auto" — the worker measures the reference and matches its orientation, so you never hand-pick or recompute the ratio. Fill the COLOR GRADING mood line from your read of the photo.

Pick the prompt block for the mode you committed to in Step 0.

---

MODE: object+background (voxelize everything except the person)

Use the @rohxit7 recipe verbatim:

ROLE: You are an expert image-transformation artist specializing in stylized photo-to-game-world conversions and cinematic color grading.

TASK: Transform the attached reference photo into a high-quality Minecraft screenshot in which the human subject(s) remain fully photorealistic and untouched, while everything else in the scene is converted into detailed Minecraft block geometry — then apply cinematic color grading derived from the original photo's mood.

CORE CONCEPT (the hero idea — do not deviate): A real, photorealistic human standing inside a fully voxel/blocky Minecraft world. The contrast between the realistic person and the blocky environment is the entire point of this image.

CONVERSION RULES:

1. KEEP PHOTOREALISTIC (do NOT alter): the human subject(s) from the reference photo; their face, skin, hair, clothing, pose, and proportions; render them exactly as they appear — no stylization, no blockifying.
2. CONVERT TO MINECRAFT (high-quality block model): all non-human elements — terrain, ground, plants, objects, structures, furniture, vehicles, sky, and background. Use clean cubic/voxel geometry with crisp 16x16-style block textures. Quality reference: a modern Minecraft screenshot rendered with premium shaders (e.g., SEUS / BSL style) — realistic lighting, soft shadows, ambient occlusion, volumetric light, sharp block edges.
3. SPATIAL FIDELITY (strict — this is a conversion, not a reimagining): preserve the EXACT camera angle, framing, and composition; keep every element in its ORIGINAL position; keep every element at its ORIGINAL relative size and scale; the human must occupy the same place and proportion as in the source; do NOT add, remove, or rearrange objects.

COLOR GRADING (apply AFTER the Minecraft conversion): Step 1 — ANALYZE the original photo first: identify its time of day, lighting direction, dominant color palette, warmth/coolness, and overall mood ([fill in the mood you read, e.g. "moody night street, cool blue sky with warm street-lamp glow" / "golden-hour warm" / "overcast neutral"]). Step 2 — APPLY cinematic color grading that matches that analyzed mood: filmic contrast curve, balanced highlights and shadows; color tone consistent with the original photo's atmosphere; subtle vignette and depth, cohesive across both the realistic human and the blocky environment so they feel like one unified image.

OUTPUT SPECIFICATIONS: single high-resolution image; sharp, detailed, professional Minecraft-screenshot quality; photorealistic human + voxel world, seamlessly color-graded.

SELF-CHECK BEFORE FINALIZING: Is the human still 100% photorealistic and unchanged? Is everything else clearly Minecraft block geometry? Are positions, sizes, and composition identical to the source? Does the color grade match the original photo's analyzed mood? Does the realistic human and blocky world feel unified, not pasted?

Loot tags in object+background are OPTIONAL. If the user wants them (or there's a clear namable hero object), insert the LOOT TAGS block below between CONVERSION RULES and COLOR GRADING, and add its tag line to TASK + SELF-CHECK:

LOOT TAGS: above or near EACH hero voxelized object, float a Minecraft inventory-style name tag — clean white pixel/bitmap font on a dark semi-transparent rounded rectangle (a Minecraft item-tooltip / named-entity tag) — naming that item: [list each hero object → its short name, e.g. "Mojito", "Sesame Latte", "Apple Cake", "Air Jordan 1", "Leica M6"]. Keep tags tidy, crisp, readable, non-overlapping, floating just above each item, and NEVER covering a person's face. (add to SELF-CHECK: "Does each hero object have a clean, readable Minecraft name tag that doesn't cover a face?")

---

MODE: background-only (voxelize the scene, keep the person AND any incidental object real)

Same @rohxit7 recipe as object+background, with CONVERSION RULE 1 widened so the person is not the ONLY thing kept real: also keep any incidental held/foreground object photorealistic. Concretely, replace RULE 1 and RULE 2 with:

1. KEEP PHOTOREALISTIC (do NOT alter): the human subject(s) — face, skin, hair, clothing, pose, proportions — AND any object the person is holding or that sits in the immediate foreground (a phone, a drink, a bag, a prop). Render all of these exactly as they appear — no stylization, no blockifying.
2. CONVERT TO MINECRAFT (high-quality block model): the BACKGROUND and ENVIRONMENT only — terrain, ground, plants, structures, furniture, vehicles, sky, and scenery behind and around the subject. Use clean cubic/voxel geometry with crisp 16x16-style block textures. Quality reference: a modern Minecraft screenshot with premium shaders (SEUS / BSL) — realistic lighting, soft shadows, ambient occlusion, volumetric light, sharp block edges. Do NOT voxelize the person or anything they are holding.

Keep CORE CONCEPT, SPATIAL FIDELITY (RULE 3), COLOR GRADING, OUTPUT SPECIFICATIONS, and SELF-CHECK from the object+background block verbatim (they apply unchanged). No loot tags in background-only.

---

MODE: object-only (voxelize just the featured object + its tableware; keep the person AND background real; float loot tags)

This is the retired Minecraft-Food recipe. Fill the bracketed list per item and keep the KEEP and label clauses verbatim:

Edit this exact photo. KEEP [the person + their face, hair, hands, clothing, accessories /OR for a flat-lay: the table, containers, plates, cups, tray, utensils] and the background/scene and lighting 100% PHOTOREALISTIC and unchanged — do not stylize [the person] at all.

ONLY transform the FOOD, DRINK and the food's TABLEWARE into 3D Minecraft voxel blocks — chunky, low-resolution cube-pixel geometry with flat blocky textures, exactly like Minecraft items, each sitting naturally where the real item was: [per-item mapping — e.g. "the ramen bowl → a blocky voxel bowl of yellow cube-noodles"; "the pepperoni slice → cube crust + voxel cheese + cube pepperoni discs"; "the steamed rice → a mound of white voxel rice cubes"].

Above or near EACH transformed item, add a Minecraft inventory-style text label: clean white pixel/bitmap font on a dark semi-transparent rounded rectangle, naming the item (e.g. [item labels]). Keep labels tidy and readable, non-overlapping, and never over [the person's face].

Final look: a real photorealistic [person / scene], but every piece of food, drink and tableware is a Minecraft voxel object with floating Minecraft inventory labels.

Then apply the COLOR GRADING step from the object+background block (analyze the source mood, grade the whole frame to match) so the voxel object and the real person/scene read as one image.

Enumerate before you generate: the single biggest lever on object-only quality is naming each food/product item AND the voxel object it should become, item by item, in the prompt. Read the source and list every dish / drink / utensil first; generic "turn the food into blocks" is mushy, per-item mapping lands.

---

Groups: in any mode, name every person in the KEEP clause so none gets blockified. Contact objects (held mug, drink, plate) voxelize with the object in object-only / object+background, but stay real in background-only.

Step 4 — Download, show, open (+ rotation check)

Download to <run-dir>/voxel-it-<subject>.png, show it, open in Finder (no analyze_media re-check — just look). PNG only unless asked. Rotation check: gpt-image-2 occasionally returns an edit rotated 90° — if sky/ceiling isn't up, rotate it back with sips -r 90 or sips -r 270 (whichever lands it upright, free, no regen) and re-view. Stills only.

Tips & failure modes

Symptom	Fix
Output rotated 90°	Rotate back sips -r 90 / sips -r 270 — whichever lands upright (free, no regen).
Person got blockified	Re-assert the KEEP clause; for groups name every person.
World barely voxelized	You're on nano-banana-pro — switch to gpt-image-2.
Person looks pasted	Make sure the COLOR GRADING block + mood line are present — that's the unifier.
Wrong things voxelized	Re-check Step 0 — you picked the wrong mode. object-only = just the featured object; background-only = just the scene; object+background = everything but the person.
Object voxelized in background-only	Widen the KEEP clause to name the held/foreground object explicitly.
Tags missing / wrong items (object-only)	You forgot the label clause, or didn't list the hero items by name. List each one.
Tags messy / overlapping / on the face	"keep labels non-overlapping, just above each item, never over a face"; re-roll.
Tags appeared but shouldn't have	You're in background-only (no tags) — drop the label clause.
Day-for-night flip	Name the night mood explicitly in COLOR GRADING.
Cropped vs source	Pass aspect_ratio: "auto" — the worker matches the reference's orientation.
Face drifted	Expected (maskless recipe). Advanced fix below.

Advanced — guaranteed identity (off-recipe). remove_background (mode="portrait") on the source → use the alpha as the gpt-image-2 mask (transparent=repaint, opaque=keep) so only the targeted region converts and the person's pixels are never touched. Off the @rohxit7 path; use only when a face must be byte-perfect.

Reference

• Engine: @rohxit7 viral recipe, verbatim. object-only prompt + loot tags: salvaged from @aibyjoe "Minecraft Food". This skill absorbs and retires both minecraft-food (object-only) and minecraft-world (object+background).
• Verdict: gpt-image-2 always; one recipe, three input-driven modes.