GameExport Pre-Flight — One-Click Validated Export for Unity, Unreal & Godot (Blender 4.2+)

GameExport Pre-Flight checks your models for the usual export problems, fixes the safe ones, and exports FBX or glTF with the right settings for Unity, Unreal or Godot.

I made this because I kept hitting the same loop: export, import into the engine, and the rotation is -89.98 or the scale is 100 or Unreal complains about smoothing groups. The settings that fix all of this are well known, but they're scattered across ten years of forum threads. So I put the whole checklist into one panel.

What it checks

13 checks run on your selected objects before export: unapplied rotation/scale, negative (mirrored) scale, missing UVs, ngons, non-manifold edges, loose verts, zero-area faces, default names like "Cube.001", empty material slots, missing texture files, plus a couple of armature checks. Clicking a warning selects the object so you can see what it's complaining about.

One-click fixes

"Fix Safe Issues" applies rotation and scale, deletes loose geometry, and removes empty material slots. It won't rename anything and won't touch your UVs - automating those never felt right.

Engine presets

Unity gets a baked space transform so meshes import at rotation 0, scale 1. Unreal gets 1:1 scale, face smoothing groups and tangent space, with optional SM_/SK_ file prefixes. Godot gets a .glb with modifiers applied.

Batch export

Each selected object (children included) goes to its own file, exported at the world origin, and your scene is put back exactly how it was. Cameras and lights are skipped. Actual errors (like mirrored scale) block the export until you fix them, or you can tick a box to export anyway.

Tested and supported

Works on Blender 4.2 and newer. Every release goes through an automated test suite that exports files and re-imports them to make sure dimensions and transforms survive the round trip. If something breaks, email trisecttools@protonmail.com with your Blender version - bug reports get priority. More at https://trisecttools.github.io