A-Pose vs T-Pose: Which Is Better for Rigging?

Before a character can be rigged, it needs a rest pose. This is the pose the model stands in while the skeleton is placed and the skin weights are worked out. Everything the character does later is measured from this pose. So a small choice at the start affects every animation after it.

What is a T-pose?

In a T-pose, the character stands straight, facing forward, with both arms stretched straight out to the sides. From the front, the body looks like a capital T.

The T-pose is easy to set up in software. The arms line up with one axis, so bones are simple to place and mirror. It has been a default for a long time, and many older rigs and tools expect it.

What is an A-pose?

In an A-pose, the arms point down and out at an angle, often around 45 degrees. From the front, the body looks more like a capital A.

The A-pose is closer to how arms rest in real life. That is why many modern character bases use it.

A-pose vs T-pose at a glance

	T-pose	A-pose
Arms	Straight out to the sides	Angled down, often around 45 degrees
Shoulders	Stretched and raised	Closer to relaxed
Arms at the sides later	Skin must stretch a long way	Less stretching needed
Arms raised overhead later	Less stretching needed	More stretching needed
Required by	Unity Humanoid, the VRM avatar format	Few tools require it
Common in	Older rigs, many game pipelines	Newer character bases, scans

Why the pose matters for rigging

Skin weights are worked out in the rest pose. The further a body part has to move from that pose, the more the skin stretches and squashes.

Think about the shoulder. Most of the time, a character’s arms are down or in front. From a T-pose, the arms have to drop about 90 degrees to get there. The skin around the shoulder and armpit stretches a lot. From an A-pose, the arms only drop about 45 degrees. Many artists find this gives better shoulders in everyday poses. Reallusion, for example, made its newer Character Creator base an A-pose partly to allow better arm and armpit shapes.

The trade-off: poses with the arms overhead, like climbing or cheering, stretch more from an A-pose.

Which pose do popular tools expect?

• Unity Humanoid says the T-pose is the default pose it requires. If a model is not in a T-pose, the avatar setup warns you and offers Enforce T-Pose to fix it.
• VRM, the avatar format used by VRoid and many VTubers, defines a required T-pose with the arms level and the palms facing down.
• Unreal Engine can retarget between any two characters, as long as their reference poses match. If one is in a T-pose and the other in an A-pose, you adjust the retarget pose of one of them.
• Mixamo asks for a default or neutral pose. It does not name the T-pose, but it warns that posed or uneven characters may fail.
• AccuRIG from Reallusion recommends a T-pose or an A-pose, and also supports relaxed and scanned poses.
• Meshy’s multi-image to 3D API has a setting to generate the model in an A-pose or a T-pose.

How to switch between A-pose and T-pose

You rarely need to rebuild a model. You can usually fix the pose at the retargeting step.

• In Unity: open the model’s Rig settings, set it to Humanoid, click Configure, and use Pose, Enforce T-Pose.
• In Unreal Engine: in the IK Retargeter, edit the retarget pose of the source or target so they match. Auto Align can help.
• In Blender: pose the armature the way you want. Apply the mesh’s Armature modifier so the mesh keeps the new shape. Then use Pose, Apply, Apply Pose as Rest Pose, and add the Armature modifier back. Test the skin weights afterward, because the mesh is now bound in the new pose.

The best pose for AI image to 3D

When you create a character from a picture, the pose in the picture becomes the pose of the model. A few habits help the AI and the rig:

1. Draw or pick a relaxed A-pose. Arms angled down and away from the body.
2. Leave space. Keep a clear gap between the arms and the body, and between the legs. Parts that touch in the picture often fuse in the model.
3. Face forward or turn slightly, to a three-quarter view.
4. Open the hands. Fists and crossed fingers are hard to rig.
5. Show the whole body, feet included.

If you have several views, a character turnaround sheet in the same pose gives the best result.

Rest poses for animals, creatures and machines

T-pose and A-pose are human ideas. Other bodies need their own neutral pose.

• Four-legged animals: standing on all four legs, legs fairly straight under the body, with a little space between them. The tail relaxed, away from the legs.
• Birds and dragons: wings half open, so each part of the wing can be seen and rigged.
• Snakes and tentacles: a gentle curve, not a tight coil. Coils make touching parts that are hard to separate.
• Vehicles and machines: doors and hatches closed, wheels on the ground, arms of a robot slightly away from the body.

Not every subject stands, and that is fine. Bake3D keeps a seated, swimming or hanging creature in its own rest pose instead of forcing it into a standing template. Separated parts matter more than the exact pose.

Quick checklist

• Decide what your target tool needs before you model or generate.
• For humans, pick an A-pose unless a tool requires a T-pose.
• Keep limbs clear of the body.
• Keep hands open and feet flat.
• Use the same pose in every view of a turnaround sheet.
• Retarget instead of rebuilding if you need the other pose later.

To see how the pose feeds into the rest of the rig, read what rigging is and how auto rigging works.