Hand

Hand builds the palm and fingers, with FK controls, optional per-finger IK and corrective joints. The wrist remains driven by the module connected to the hand.

Configuration

In Module Manager, choose Hand in Module Bank, or its instance in Scene Modules.

Hand · CONFIGURATION · Poseidon theme. Default configuration, IK disabled.

Reference	Purpose
1 · Side & Display	Side chooses the source side; Mirror, enabled by default, builds both sides. Display sets controller size, curve width and hiding during playback.
2 · Colors	Main Color regenerates the source-side palette; Output Color sets the deformation joint color.
3 · Topology	Fingers keeps 0 to 4 fingers in Index, Middle, Ring, Pinky order. Thumb adds the thumb independently. Default: 4 fingers and the thumb.
4 · IK	T / I / M / R / P enables IK for Thumb, Index, Middle, Ring or Pinky. None by default. Stretch and Soft IK add the corresponding settings to the IK targets.
5 · Adjustments	Adjustment Joints adds a corrective joint per finger segment. Rotate Amount controls bend following; Scale Amount, Z-axis bulging. Default: 0.5 each. Segment Amounts sets per-segment Rotate or Scale overrides, or restores the global value.
6 · Design	SHAPE and COLOR set the appearance of Digit Meta, Digit Segments, In / Out Meta, IK Targets and Options, where built.

Topology, IK activation and joint additions require Rebuild on an existing instance. Adjustment coefficients, Display, shapes and colors apply live. Per-segment values remain stored when a finger is disabled.

Placement

The palm carries the finger chains: Meta → 01 → 02, followed by 03 for non-thumb fingers. Placer scale is locked.

Placer	Role
Palm and Meta	Position and orientation of the palm and each finger root: free translation and rotation.
01, 02, 03	Segment length and rest bend: Translate Y and Rotate X only.
Tip	End of each IK-enabled finger: Translate Y only. Used by the IK solve, with no additional deformation output.
In / Out Meta and Options	Position and orientation of the access controls, where included by the configuration.

Both sides share one configuration with Mirror enabled. Use two instances for different left and right topologies.

Controls

Controller	Role
Digit Meta / Digit Segments	FK controls for the metacarpals and segments of each active finger.
In / Out Meta	Distribute their movement across the metacarpals to cup the palm. Available with at least two non-thumb fingers.
IK Targets	One fingertip target for each IK-enabled finger.
Options	Collective finger settings and FK / IK selectors.

On Options, each IK-enabled finger has its own FK / IK selector, defaulting to FK. Changing mode does not match the controls: the Switch FK/IK tool does not support Hand.

Module Preview

Hand · Module Preview · Poseidon theme.

Finger settings

On Options, depending on the active fingers. All these settings default to 0.

Setting	Effect
Curl	Bends all finger segments, including the thumb.
Thumb / Index / Middle / Ring / Pinky Curl	Additional bend for the corresponding finger.
Thumb Opposition	Thumb opposition from its metacarpal.
Lean	Additional bend on the first segment of non-thumb fingers.
Length	Length offset on the second and third segments of non-thumb fingers.
Spread	Spreads non-thumb fingers; available with at least two fingers.

IK settings

On each IK Target. Construction options add these attributes; their values are then set in the Channel Box.

Setting	Effect
Bend Plane	Orients the finger bend plane without a Pole Vector control. Default: 0°.
Stretch	Controls extension from 0 to 1. Default: 0, no stretch.
Soft IK	Softens the approach to full extension, from 0 to 2. Default: 0, no softening.

Inputs and outputs

Each side has its own ports. The single wrist input and anatomical outputs expose driver and reference; corrective outputs expose driver only.

Direction	Port	Role
Input	wrist	Shared input for the hand’s FK controls and IK targets, typically connected to Arm’s wrist output.
Output	palm	Palm motion.
Outputs	index_meta, index_01…	Metacarpal and segments. The same convention applies to thumb, middle, ring and pinky: 2 segments for the thumb, 3 for the others.
Outputs	index_adjustment_01…	Optional corrective joints, one per segment. The same convention applies to each active finger.

The default configuration provides 20 anatomical and 14 corrective outputs per side, each with its deformation joint.