Getting a Houdini asset into Unity cleanly is mostly about deciding scale, axis and naming before the FBX leaves Houdini. Fix it at export and you skip a round of per-asset cleanup in the Unity importer.
Scale and up-axis
Unity works in metres with a Y-up, left-handed coordinate system. Houdini is also Y-up, which helps, but scale and handedness still need attention: export FBX with the right unit scale so a Houdini metre reads as one Unity unit, and check that assets do not arrive mirrored or rotated. Deciding this once and applying it to every export keeps the whole project consistent.
FBX export settings that matter
- Units. Match Unity's metres so nothing imports 100x off.
- Pivots. Bake transforms so pivots sit where Unity expects - origin for props, base for placed pieces.
- Normals and smoothing. Export normals explicitly so shading matches what you built in Houdini.
- Mesh names. The FBX node and mesh names become the Unity asset names, so set them deliberately in Houdini.
Naming for a navigable Unity project
- No spaces or special characters. Export
env_rock_v003.fbx, notrock final (2).fbx- Unity rewrites the rest and you lose the thread. - Prefix by type so the project window sorts cleanly - a consistent scheme for meshes, materials and textures.
- Padded version tokens so re-exports do not overwrite and the current version is obvious.
- Match texture names to materials so Unity's material extraction lines up instead of producing orphaned maps.
Check it before it hits Unity
Hive scans your Houdini project and export folder in the browser and flags export names that will not survive a Unity import - spaces, special characters, inconsistent versions, mismatched texture names. Catch it at your desk instead of in the Unity console. See the Unreal handoff checklist for the UE5 side, and the Unity Studio Hub validates naming once assets are in your Unity project.
Frequently asked questions
What scale should I export from Houdini to Unity?
Unity works in metres. Export FBX so a Houdini metre reads as one Unity unit, and apply the same setting to every asset so nothing imports 100x off.
Do Houdini and Unity share an up-axis?
Both are Y-up, which helps, but you still need to check unit scale and handedness so assets do not arrive mirrored, rotated or the wrong size.
Can Hive check my Unity export naming?
Yes. Hive scans your project and export folder in the browser and flags names that will not survive a Unity import - spaces, special characters, inconsistent versions - without uploading anything.