Mechanic Girl

Modular Components and Mesh Structure of Mechanic Girl

Mechanic Girl provides a modular production asset centered around a female technician design, configured with distinct mesh sections that allow clothing and accessories to be detached or swapped. The complete figure consists of separate geometry layers covering the torso, limbs, footwear, head, and outfit pieces. To prevent underlying geometry from intersecting with the outer clothing layers during movement, the body mesh is sliced into independent segments beneath the garments. Disabling or hiding unseen geometry reduces the overall polygonal overhead during rendering while eliminating clipping along seams, shoulders, and waistlines.

Across its combined parts, the mesh operates without an integrated level-of-detail system, carrying a base budget of 42,625 faces, 67,414 triangles, and 45,836 vertices. The package includes a full-body model underneath the apparel. This base body utilizes a censored skin texture, and the anatomical mesh remains plain and unsculpted without specialized deformation morphs or secondary adult rigging. Accessories complement the modularity: glasses can be toggled on or off, and two separate hairstyles provide distinct visual silhouettes. In addition to individual parts made for modular attachment, an assembled file containing all geometry in a single file is provided for custom configuration needs.

Skeleton Extensions and Hair Dynamics

The skeletal hierarchy is built directly on standard Humanoid conventions, making it natively compatible with the Epic Skeleton in Unreal Engine as well as the standard Humanoid avatar mapping in Unity. Beyond standard joint placement, the skeleton includes specialized supplementary bones engineered for secondary motion. These additional deformation points comprise dedicated eye joints for left and right gaze positioning, a jaw bone for mechanical speech movement, left and right breast joints, and three sequential sleeve deformation bones per arm. Hair styling is likewise supported by targeted deformation chains, with short hair branches containing four joints on each side, alongside main hair chains covering left, right, and back regions across three bone tiers.

These secondary bones provide anchor points for real-time physics simulation. In Unreal Engine workflows, dynamic cloth or bone movement can be driven using external tools such as the KawaiiPhysics plugin to yield responsive physical behavior across hair tresses and loose sleeves. Furthermore, the hair materials support a built-in fake wind simulation that injects subtle ambient motion into the strands directly through the vertex pipeline. Artists who prefer clean physics simulation or purely static hair can deactivate the wind shader logic by adjusting the material properties or reassigning the mesh to default surface shaders.

Facial Tracking via Calibrated Blendshapes

Facial performance across the character is handled through 52 calibrated Apple blendshapes, offering comprehensive morph coverage for speech, ocular tracking, and nuanced emotional expressions. These morph targets are mapped to standard ARKit naming conventions, enabling plug-and-play synchronization with live performance-capture ecosystems. Facial capture has been tested across Unreal Engine 5 using Live Link Face and within Unity via standard Face Capture setups.

Because the facial targets map to standard streaming formats, the rig translates smoothly into production pipelines requiring live facial mocap, VTuber streaming setups, VR tracking applications, and animated cinematics. In native game projects, these targets function as standard morph targets in Unreal Engine or blendshapes in Unity, allowing narrative cutscene animations to integrate lip sync and gaze shifts alongside secondary jaw bone movements.

Mechanic Girl Material IDs and Texture Architecture

Surface texturing relies on 4K resolution maps distributed across eight individual texture sets: Body, Head, Eyes, Lashes, Clothes, Shoes, Hair, and Cornea. The maps are packed to optimize memory usage and rendering throughput, standardizing across channels for BaseColor, Normal, Roughness, Metallic, MetallicSmoothness, and MaskMaps. Dependent on the specific surface requirement, individual sets also provide Ambient Occlusion, Opacity, and Emissive channels.

Color customization is driven through MatID maps assigned to the skin, eye surfaces, and clothing elements. By isolating distinct material sections within single texture layouts, the MatID channels allow developers to dynamically tint BaseColor values without authoring separate texture files for every color variant. Custom shader graphs and Unreal material instances make use of these MatID masks for rapid color alterations on the fly. Head and body surface sets also include dedicated tattoo and scar maps, giving developers the option to apply surface weathering, injury marks, or customized body art directly through the material instances.

Animation Retargeting and Pipeline Integration

The asset integrates into Unreal Engine starting at version 4.24, deploying separated meshes configured to work alongside Master Pose Component or Leader Pose Component architectures. Third-person standard animations are provided to verify basic locomotion out of the box. Compatibility testing extends across a broad selection of community and commercial animation frameworks, confirming proper deformation and socket alignment across Advanced Locomotion System v4, the Lyra Starter Game Template, Valley of the Ancient, Female Interactions Animations, Close Combat: Swordsman, Succubus AnimSet, ARLS + Horse Animset, and broad Mocap Library data.

Within Unity, the package supports version 2021.3.451f1 and above, providing material setups for the Built-in Render Pipeline, Universal Render Pipeline (URP Lit), and High Definition Render Pipeline (HDRP Lit). Any standard Humanoid-targeted motion assets from the Unity ecosystem can be retargeted directly to the character's core joints. The underlying mesh architecture is also designed to maintain structural compatibility with the Roxy female base character framework.

As a pure character resource, the package focuses strictly on geometry, texturing, dynamic hair structures, and deformation hierarchy. It contains static poses, skeletal meshes, and modular assets, leaving core gameplay scripts, state machines, movement controllers, props, and scene environments to be defined within the broader host project.

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