Rengi Forge

Game assets in. Engine-ready files out.

33 tools for your own game files, used from Claude while you make a game: cut out sprites, light them, slice video into sheets, build tiles, materials, LODs, colliders and store art.

Add to ClaudeCall it from an agent
A low-poly house rendered on a flat green background
The same house cut out with a clean edge on a transparent background
Remove background: one-color backdrops are keyed exactly, busy ones go through a background-removal model. Drag to compare.
The flat orange orb sprite that went inThe same orb lit from a light circling it, using the generated normal map
Normal map for 2D lights5 credits or $0.05A flat sprite gets normal and height maps. Here it turns under a moving light.
A map of grass patches on dirt with smooth, irregular edges, painted with the generated tilesThe grass texture that went in
Autotile set15 credits or $0.15Grass over dirt becomes 47 blob tiles with rules for Tiled, Godot 4 and Unity. This map is painted with them.
The purple slime jumping, played from the generated frames
Video to sprite sheet15 credits or $0.15An MP4 of a jump turns into trimmed frames, a sheet and a looping preview.
Flagstone material rendered with the generated maps under a raking lightThe stone photo that went in
Material from one photo15 credits or $0.15A stone photo becomes albedo, normal, roughness, AO and height maps. Shown lit, tiled.
A wooden table next to its collision: one colored convex hull per leg and one for the top
Colliders15 credits or $0.15Convex hulls that hug the model, named for Unity, Unreal or Godot.
The same castle ring at four levels of detail, from 26,000 triangles down to 3,300
Levels of detail20 credits or $0.20Four LODs in one GLB, each about half the triangles of the last, with no spikes or holes.
Ten Steam store images for a game called Ember Quest, each cropped to its own size
Store art20 credits or $0.20Key art and a logo become every Steam capsule, header, hero and logo size. Other stores and app icons too.
A top-down grass map with a dirt road across it, dense forest at the top and sparse trees below
Level layout100 credits or $1.00Sketch zones (a road, a wood) and get them filled with your own tiles, as a Tiled and a Unity map.
BeforeWaveform of the raw voice take with a noisy floorAfterWaveform after cleanup: silent gaps and three separate lines
Voice take cleanup10 credits or $0.10Noise and hum out, level evened, the take split into one file per line.

In Claude

  1. Add a custom connector in Claude with this address:
    https://rengi.dev/app/mcp
  2. Sign in with Google when Claude asks. Every account gets 300 free credits a day; failed calls cost nothing.
  3. Attach a file and ask in plain words, for example "cut this character out and make a normal map". In claude.ai, allow rengi.dev once under Settings → Capabilities so attached files go through by themselves (how); otherwise you drop the file into the upload panel Claude shows.

Only need part of it? There are smaller sets for 2D, 3D, Audio and Release: addresses in the docs.

Files you send and results are deleted after 7 days. Privacy

From an agent

No account and no key: each call is paid on the spot in USDC on Base with x402, and only when it succeeds. MCP at https://rengi.dev/mcp, HTTP described in llms.txt and openapi.json.

import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`);
const pay = wrapFetchWithPaymentFromConfig(fetch, { schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(account) }] });
const res = await pay("https://rengi.dev/v1/sprite-tools/remove-bg", {
  method: "POST", headers: { "content-type": "application/json" },
  body: JSON.stringify({ imageUrl: "https://rengi.dev/samples/prop-on-white.png" }),
});
console.log(await res.json()); // { image: <link to the cut-out PNG>, mode, ... }