Our all-in-one tool for anything 3D: hard-surface modelling, sculpting, texture painting, block-outs,
rigging, animation, and sometimes texture creation and procedural generation.

Blender, the latest official version. We use the Steam build, so it updates itself.

→ https://store.steampowered.com/app/365670

Our add-on, installed through the Bubbly Games Launcher. Do not skip it. Almost everything
on this page below here is the add-on rather than Blender.

The Asset Rules panel (N-sidebar) checks your names and pivots while you are still modelling.
That is the cheapest moment to find out you got one wrong.

Set each collection's kind (prop, wall, floor, ceiling) before you expect the checks to mean
anything. The pivot rule is different for each, so a collection that has not said what it is cannot be checked.
→ Check Your Work

The exporter. Always export through the add-on rather than Blender's own FBX export. It runs a check for obvious problems first, and it knows where the file goes.

Orientation guides, for the forward convention: -Y forward in Blender, which is +Z forward in Unity.

The conventions that apply inside Blender (scale, forward axis, pivots, material slots, shape keys, bones) all live on Bubbly Games/Workflows/3D Models/3D Models. They are not repeated here, so there is only one copy to keep up to date.

The two that catch people first: 1 Blender unit = 1 metre in Unity, and textures are not
embedded in the .blend or .fbx. They import separately so Unity keeps control of import
settings.

For a tutorial and more info on the addon, see here: Bubbly Blender Addon.