This wiki is intended for older versions of Motive. For the latest documentation, please refer to
docs.optitrack.com

Entertainment Markersets

There are total eight different Motive (baseline) Markersets. These markersets use a similar placement template, and many marker locations are shared. Higher count markersets have extra markers added to the Baseline(41) markerset. Hinged toe markersets have extra markers on each foot, and finger markersets have extra markers on the hand for estimating the finger pose. The upper body and lower body markersets use same marker placements but only on either section of the body. The following charts describes where each marker is placed in the baseline markersets.

Head markers

Label Related Segment Description
HeadTop Head Place at the tip of the actor's head
HeadFront Head Place at the center of the forehead.
HeadLeft Head Place on the left side of the head, about 5 cm behind the left ear.
HeadRight Head Placed on the right side of the head, right above the right ear.


Torso Markers

Label Related Segment Description
BackTop Torso Place the marker on the spine right below the neck. (LUArmHigh, LShoulderBack, BackTop, RshoulderNack, and RUArmHigh should align roughly in a line when in T-pose.)
Chest Torso Place the marker at the center of the sternum, about 5 cm below where the neck starts.
ChestTop* Torso Place the marker at the top of the sternum, 1~2 cm below the center of the clavicle bone.
ChestLow* Torso Place the marker at the lowest section of the Sternum ( Xiphoid Process) where bottom of two rig cages conjoin.
BackLeft Torso Refer to the Skeleton avatar for the relative position. These two markers are located symmetrically on the sides of the back.
BackRight Torso
WaistCBack Pelvis Place the marker about 2 cm above one of the dimples located on the waist back (posterior iliac spine bone).
WaistLFront Pelvis These markers are place at the protruding bone (left/right anterior iliac spine bone) located on the front of the pelvis. They can be palpated at the left and right side of the waist.
WaistRFront Pelvis
WaistLBack Pelvis Place the WaistLBack and WaistRBack markers right above the left/right hip; about 10 cm higher than the hip joint.
WaistRBack Pelvis

Shoulder Markers

Label Related Segment Description
LShoulderBack Shoulder Place the marker at the shoulder joint (glenohumeral joint) on the back. Repeat few cycles of arm abduction and adductions to palpate where skin movements are minimal during the range of motions.
RShoulderBack Shoulder
LShoulderTop Shoulder Place the marker at the distal end of the clavicle bone on the left/right shoulder where you can palpate the protruding bone (Acromioclavicular joint).
RShoulderTop Shoulder

Arm Markers

Label Related Segment Description
LElbowOut Upper Arm Place the marker on the elbow point, slightly towards the upper arm, or the distal end of the humerous. Ask the actor to flex and extend the arm few times to confirm that markers are placed along the elbow axis and maintain stationary throughout the range of motion cycles.
RElbowOut Upper Arm
LUArmHigh Upper Arm Placed on the back of the upper arm segment. (LUArmHigh, LShoulderBack, BackTop, RshoulderNack, and RUArmHigh should align roughly in a line when in T-pose.)
RUArmHigh Upper Arm
LFArm Fore Arm Place the marker on the side of the forearm. Refer to the avatar in Skeleton pane.
RFArm Fore Arm

Hand Markers

Label Related Segment Description
LWristOut Fore Arm / Hand Place it at the outside (lateral side) of the wrist axis. Palpate the wrist and feel for the protruding bone (distal end of the radius bone).
RWristOut Fore Arm / Hand
LWristIn Fore Arm / Hand Place it at the inside (medial side) of the wrist axis. Palpate the wrist and feel for the protruding bone (distal end of the ulnar bone).
RWristIn Fore Arm / Hand
LHandOut Hand Place it below the pinky knuckle. More specifically, between the distal end of the fifth and fourth mertacarpal bones.
RHandOut Hand
LHandIn Hand Place the marker below the knuckle of the index finger.
RHandIn Hand

For best results, place the hand markers so that the shape of the marker arrangement is asymmetrical itself. Also, marker the arrangements one hand unique to the shape on the other hand to prevent label swaps. Since the wrist markers are placed along the wrist axis, offset the HandOut or the HandIn markers to create unique squares.

Leg Markers

Label Related Segment Description
LKneeOut Upper Leg Place the marker on the lateral epicondyle of the femur. Palpate the knee for protruding bone from the upper leg, and place it right on the axis. Ask the actor to flex and extend the knee few times to confirm that markers are placed along the axis and maintain stationary throughout the range of motion cycles.
RKneeOut Upper Leg
LThighFront Upper Leg Place the marker on the front side of the thigh, along the midline.
RThighFront Upper Leg
LThighSide* Upper Leg Place the marker on the lateral side of the thigh. Ideally, L/R ThighSide, L/R KneeOut, and L/R AnkleOut markers should be roughly in a line.
RThighSide* Upper Leg
(*) markers in the Baseline + 13 Additional Markers markerset

Foot Markers

Label Related Segment Description
LAnkleOut Lower Leg/Foot Place the marker on the lateral malleolus bone on the ankle.
RAnkleOut Lower Leg/Foot
LShin Lower Leg Place the marker on the shin bone; on the midline of the lower leg.
RShin Lower Leg
LToeOut Foot Distal end of the fifth metatarsal bone, just before the little toe joint.
RToeOut Foot
LToeIn Foot Distal end of the first metatarsal bone, before the big toe joint.
RToeIn Foot
LHeel Foot Place at the center of the heel.
RHeel Foot
LToeTip Toe Place the marker on the second toe.
RToeTip Toe