Four channels.
One texture.
Route your PNG mask maps into a real RGBA file. Inspect the stored bytes. Keep your originals and reuse the mapping.
iPhone & iPad · $3.99 US upfront purchase
No subscription, account or advertising.
App Store release pending review. Local prices may vary.
From source maps to a usable file.
Route deliberately
Choose source red, green, blue or alpha for every output channel. Set a byte constant or invert with 255 minus the sample. ORM, RMA and HDRP mask recipes use source order, with every assignment visible.
Inspect the result
View packed RGB or each isolated channel. Read exact bytes at a top-left pixel coordinate. Optional nearest resampling is explicit; default dimensions must match.
Keep the workflow
Retain twelve local packs with eight originals each. Duplicate a pack and keep eight named mapping presets for repeated handoffs.
Real outputs, ready for handoff.
Write a packed RGBA8 PNG, four grayscale masks, a two-page PDF proof, CSV assignments with original SHA256 hashes, recipe JSON, readme and a ZIP of the nine derived files. Use native sharing and PDF Quick Look. Retained originals can be shared individually; the ZIP excludes them. Recipe JSON is documentation, not an importable backup.
Know the format before buying.
Non-interlaced 8-bit gray, RGB, gray-alpha and RGBA PNG.
1–2048 pixels per side. Up to 32 MB per source.
No palette, low-bit, 16-bit, tRNS, APNG, JPEG, TIFF or EXR support.
Output preserves RGB beneath zero alpha. No gamma/ICC conversion.
RGB preview ignores alpha. This is numeric 2D channel packing, not a shaded 3D preview, baking, atlas maker or normal-map generator. Color-profile and descriptive chunks are not copied. Set non-color or linear import options in your destination software and verify its channel convention. Game-engine and physical-device compatibility has not been tested. Maprelay is independent of engine vendors.
Store images show an original synthetic tile study. The installed library starts empty; the study is an explicit option.
Support
Email maga40@naver.com with Maprelay, the app version, device/iOS version and steps to reproduce a problem. A source file is optional; share only material you have permission to send.
Import or dimension errors
Export a static supported 8-bit PNG before importing. By default, each selected source must match the output size. Enable nearest resampling only when selecting stored samples at a new size is appropriate.
Work and deletion
Changing a route invalidates the current in-memory output. Repack and rewrite before sharing. Deleting a pack removes its retained originals and derived files. Keep your source backups elsewhere. Presets refer to source import order; missing slots prevent applying them.
Privacy policy
Effective October 2, 2026. Gobling Company does not collect personal data through the Maprelay app. The app has no account, analytics, advertising, remote file processing or network SDK.
Imported PNGs, mappings, notes, presets and generated files are stored in the app's local Documents directory. They remain on the device unless you choose system sharing or Files export. Apple's device backup and any destination service you select are governed by those services' own policies.
Deleting a source removes the retained original from that pack and resets its assignments. Deleting a pack removes its folder. Deleting the app removes its app container, subject to platform backup behavior. Exported or shared copies must be deleted in their destination separately.
If you email support, we receive the address and information you voluntarily provide, and use them to respond. Do not send confidential files. This website may have ordinary hosting access logs; it does not receive documents from the app. Questions: maga40@naver.com.
Terms of use
Use source files you own or are authorized to process. Inspect channel assignments and output values before downstream use. Recipes are conveniences, not automatic semantic recognition or engine certification. You remain responsible for backups and destination import settings. Apple processes purchases and refund requests. The app is provided subject to Apple's standard licensed application terms and applicable consumer rights.