Repair normals without leaving the browser

Upload loose DFF files for batch fixes, or drop a full IMG archive to patch embedded DFFs and rebuild a downloadable IMG.

Default behavior Double-sided safe

Flat double-sided handling and Z-up correction start enabled so common mapping artifacts are fixed without extra setup.

Batch mode ZIP output for multiple DFFs

Drop several DFFs at once and download all repaired files as one archive.

Archive mode IMG in, IMG out

Uploaded IMG files are scanned, embedded DFFs are repaired, and the archive is rebuilt for download.

Repair options

Normals rebuild settings

Recommended defaults active

Core

Smoothing angle Weld epsilon Flat-mesh epsilon

Default flags

--flat-double-sided Reject opposite-face smoothing on likely double-sided geometry. --double-sided-z-up Force detected double-sided regions to Z-up normals.

Advanced options

Cross-vertex weld Equivalent to leaving --no-cross-vertex-weld off. Add missing normals Equivalent to leaving --no-add-missing off. Skip double-sided no-normals Keep the tool conservative for double-sided meshes with no normals. Flat-mesh heuristic Detect likely double-sided meshes by face structure. Force flat all Recalculate normals in flat mode for every geometry. True flat split Split shared vertices for intrusive true-flat shading. Dedupe opposite faces Use with true flat split to discard opposite duplicate triangles. Debug flat mesh Expose mesh-heuristic debug info in the run log.

Queued work

Analysis

Ready to repair

Progress

Repair pipeline

Waiting

Ready to process 0%

Current file -

Processed 0 / 0

Archive mode Idle

Downloads

Repaired output

Ready

Files changed 0

Geometries patched 0

Output size 0 MB