VRM Export

Terminology	Meaning
Root	Topmost parent of an object
Hierarchy	Root and its children

v0.58~

vrm export

The export dialog is based on Unity’s EditorWindow

How to use

VRM Exporter Window

Open VRM Exporter Window by VRM0 -> Export UniVRM-0.XX

vrm_menu

Previous versions:

UniVRMExportHumanoid

• You can directly pick up exportable target in the Project Window. There is no need to put the Prefab in the scene first.

Export Target Setup

• Drag

vrm export

• Selector

vrm export

Conditions for Valid ExportRoot

vrm export

The setting screen for ExportRoot will show up if the following conditions are satisfied:

• Must be topmost parent

• Root’s Rotation and Scaling are Default (changing Translation is allowable)

• Has Animator component attached and Animator.avatar is humanoid

• Faces the positive Z-axis (identified by the bone positions of left and right feet)

• Contains active mesh in the Hierarchy

Exporter Interface

Please set up Meta and ExportSettings.If you get warning messages, it is optional for you to correct those warnings or not.If there is no error messages shown, you can go ahead and press export button at the lower right corner of the dialog.Details about VRM size calculation can be found here.

Export Option

Here is a list of additional processing during export:

Force T Pose

Force T-Pose before export.If you can manually make T-Pose for model, it’s ok without selecting this option.

Pose Freeze

Model’s normalization.If Model’s normalization is already done, there is no need to perform model normalization again. However, if additional parts are added into the model (not normalized yet), model normalization is required.In Hierarchy, all GameObjects’ rotation should be 0, and their scale should be 1 if a model has been normalized.

In v0.58, the system can automatically identify whether the export target needs PoseFreeze

UseExperimentalExporter

Exporter’s Serializer version.It will not affect the output whether this option is selected or not.

UseSparseAccessor

Uses Sparse Accessor feature in GLTF: only records BlendShape vertices with non-zero value.If the model contains multiple BlendShapes, enabling this can help reduce the file size.

OnlyBlendshapePosition

BlendShape’s Normal and Tangent will not be exported if this option is selected.The file size can be reduced.Be aware that errors may occur during import if the export target is made by UniVRM-0.53 or earlier versions.

ReduceBlendshape

BlendShapes that are not referenced by BlendShapeClips will not be exported.The file size can be reduced.

ReduceBlendshapeClip

BlendShapeClip belonging to Preset.Unknown will not be exported.Used in combination with ReduceBlendshape.

RemoveVertexColor

Vertex color will not be exported.In GLTF, there is no setting that can disable the color vertex usage.UniVRM supports vertex color for unlit shader.

List of Error Messages

message	0.56	0.57	0.58
The Root translation, rotation and scale will be dropped	error	warn	error (changing translation is OK)
Jaw bone	warn	warn	warn
Same name bone	error	warn (auto-rename)	warn
Vertex color	warn	warn	warn
Unknown shader	warn	warn	warn
Require source	error	error	error
Require no parent	ok	ok	error (new)
Require Z+ forward	ok	ok	error (new)
Require animator	error	error	error
Require humanoid avatar	error	error	error
Require Title/Version/Author	error	error	error
No active mesh	error	error	error
Prefab export	error	error	No active mesh
Springbone validation	ok	ok	warn

Require source

Please select a valid object that can be exported as VRM file in the scene.

Require animator.

Animator component cannot be found in Root (non-humanoid).

Require animator.avatar

avatar cannot be found in Root’s Animator (non-humanoid).

Animator.avatar is not valid.

Animator.avatar is not humanoid.

Animator.avatar is not humanoid. Please change model’s AnimationType to humanoid.

Please change the setting to humanoid (from Inspector: FBX Import -> rig -> AnimationType).

Require Title.

Please enter the title of this model in the dialog.

Require Version.

Please enter the version of this model in the dialog.

Require Author.

Please enter the author of this model in the dialog.

No active mesh

No active mesh in hierarchy.

FileName ‘{0}’ is too long.

Material, Texture and Mesh names are too long. Please rename them.

The Root translation, rotation and scale will be dropped

A model is allowed to export if Root’s translation, rotation and scale are not Default values. However, those values will be lost.We recommend moving this object in the Hierarchy to be Root’s child.

Jaw bone is included. It may not what you intended. Please check the humanoid avatar setting screen

Jaw (chin) bone is included in humanoid setting.There is a possibility that the jaw bone is automatically assigned during FBX import. As a result, facial parts (e.g. bangs) are mis-recognized as jaw and being assigned to Jaw bone.Therefore, bangs will have weird movements due to this issue.Please remove this setting in Inspector FBX Importer -> rig

There are bones with the same name in the hierarchy. They will be automatically renamed after export

A model is allowed to export if there are bones with the same name in this model. Only the warning message will be given in Export dialog. Those bones will be renamed automatically.

This model contains vertex color

If you see this message, there are meshes that contain vertex color in the Hierarchy.

Vertex Color	If contained	Behavior
Before UniVRM-0.53	not applied	ignore vertex color effect
From UniVRM-0.54	applied	show vertex color effect

Unlitで頂点カラーが含まれているが使わないという設定がありせん。 必要ない場合は、Remove Vertex Color オプションで削除できます。

If Unlit is used, there is no setting that can disable vertex color usage.If necessary, please choose Remove Vertex Color option to direct remove vertex color data from the model.

Materials other than Standard, Unlit, MToon will be defaulted to Standard.

v0.57

vrm export

The export dialog is based on Unity’s ScriptableWizard.We will improve it in the later version.