I'm the publisher of PREFLIGHT TOOLKIT, three small command-line tools just released here for checking asset deliveries before handoff. Each writes local HTML and JSON reports and keeps source files unchanged.
UDIM Preflight 0.1.2 — $5
Check a documented UDIM filename profile, explicitly required tiles and supported texture images. The free example catches missing required tile 1011, then passes after a manual correction.
https://wisla.itch.io/udim-preflight
Game Asset Preflight 1.0.0 — $7
Find missing external glTF/GLB and OBJ/MTL references, path portability and supported-texture issues. FBX is inventory only.
https://wisla.itch.io/game-asset-preflight
Sprite Sheet Preflight 1.0.0 — $5
Check one PNG against a grid you declare. An indexed, clickable frame map points to empty cells, exact repeats and border measurements. Intentional empty/repeated frames are warnings unless explicitly forbidden.
https://wisla.itch.io/sprite-sheet-preflight
The three tools are also available together for $13, compared with $17 separately. This offer runs through 23 September 2026, 23:59 Europe/Warsaw; individual tools remain available at $5 / $7 / $5.
https://itch.io/s/200590/preflight-toolkit-3-utility-bundle
Free sample reports are available on every product page; the paid scanners are not included in those samples. These tools identify problems for you to review and correct. They do not repair assets or guarantee engine import or rendering.
Python and Pillow 12.3.0 are required. UDIM is tested on Linux with Python 3.12.13/3.13.5; Windows/macOS runtime is unverified. Game Asset and Sprite are tested on Windows 11 with Python 3.12.14; Linux/macOS are unverified. Scans use no uploads, telemetry or paid API. Initial dependency setup may use the internet.
AI assistance for code, text and graphics is disclosed on the product pages. If you review asset deliveries, which is harder to catch before handoff: missing references, inconsistent texture names, or a sheet that no longer matches its declared grid?
Example below: UDIM 0.1.2 on synthetic PNGs. Tile 1011 was explicitly required and absent; this board summarizes the measured FAIL report, not an engine screenshot or automatic repair.
