Micro-niche audit 2026-02-26 04:40 UTC: object-only checklist for detecting synthetic short-video artifacts

Object-only checklist for detecting synthetic short-video artifacts:

1. **Facial Features and Expressions:**

* **Eye Consistency:** Are both eyes identical in shape, size, and pupil dilation? Do they track the same direction simultaneously and naturally? Look for unnatural symmetry or a lack of subtle, asynchronous movements that characterize real eyes. Are reflections in the eyes consistent and realistic across both irises?

* **Pupil Behavior:** Do pupils dilate and constrict appropriately with changes in perceived light or emotional state? Are they unnaturally fixed or reacting in unison without a clear external stimulus?

* **Skin Texture and Pores:** Is skin texture uniform across the entire face, or are there areas of unnaturally smooth, poreless, or overly uniform texture? Look for a lack of subtle blemishes, moles, or variations in skin tone that are characteristic of real skin.

* **Facial Symmetry:** While some natural asymmetry exists, are facial features (e.g., eyebrows, mouth corners, nose shape) unnaturally perfectly symmetrical?

* **Lip Sync Accuracy:** Do lip movements perfectly and consistently match the audio, without any lag, distortion, or unnatural smoothness? Pay attention to the transition between phonemes.

* **Subtle Expressions:** Are micro-expressions (e.g., slight twitches, blinking patterns) present and varied, or are they absent, repetitive, or too exaggerated/understated for the context?

* **Teeth Appearance:** Are teeth unnaturally uniform in shape, size, and color? Do they appear too perfect or too clean, lacking any subtle imperfections like slight chips or variations in enamel?

2. **Hair and Hairline:**

* **Strand Behavior:** Does individual hair strand movement appear natural, reacting to air currents or head movements? Look for hair that moves as a solid mass, lacks individual strand detail, or exhibits unnatural stiffness.

* **Hairline Definition:** Is the hairline unnaturally sharp and perfectly defined, or does it blend naturally with the forehead skin? Look for instances where hair appears to be "pasted" onto the forehead.

* **Root Detail:** Is there sufficient detail at the roots of the hair, where it meets the scalp? Unnatural smoothness or a lack of fine root hairs can be a tell-tale sign.

* **Shine and Highlights:** Are highlights on hair consistent with light sources in the scene? Unnatural, uniform sheen or misplaced highlights can be indicative.

3. **Body and Limbs:**

* **Joint Articulation:** Do joints (elbows, knees, wrists, fingers) bend and move with natural fluidity and limitations? Look for unnatural stiffness, jerky movements, or impossible bending angles.

* **Hand and Finger Detail:** Are hands and fingers rendered with sufficient detail and naturalistic movement? Look for unnaturally stiff fingers, fused digits, or a lack of fine motor control in gestures.

* **Muscle Definition and Movement:** Does muscle definition shift and flex realistically with body movements? Or does it appear static, unnaturally rigid, or shift in ways that don't correspond to physical exertion?

* **Proportions and Anatomy:** Are body proportions consistent with human anatomy? Look for subtle distortions in limb length, torso size, or head-to-body ratio.

* **Skin Folds and Wrinkles:** Do skin folds and wrinkles appear natural and consistent with body posture and movement? Unnatural flattening or absence of folds in areas that should crease can be a sign.

4. **Clothing and Fabric:**

* **Fabric Draping:** Does fabric drape naturally over the body, reacting to gravity and movement? Look for clothing that appears stiff, unnaturally smooth, or moves independently of the wearer's body.

* **Texture Realism:** Does fabric texture appear realistic, with appropriate sheen, weave, and wear? Unnatural uniformity or a lack of subtle texture variations can be a giveaway.

* **Seam and Stitching Detail:** Are seams and stitching rendered with sufficient detail and accuracy, or do they appear blurred, inconsistent, or unnaturally perfect?

* **Wrinkles and Creases:** Do wrinkles and creases in clothing appear natural and consistent with the fabric type and the wearer's posture and movement?

5. **Environmental Interactions and Physics:**

* **Shadow Consistency:** Do shadows cast by objects and individuals appear consistent with the light sources in the scene? Are shadow edges sharp or soft as expected? Look for shadows that are too dark, too light, misplaced, or lack appropriate diffusion.

* **Reflections:** Are reflections in surfaces (e.g., mirrors, water, polished objects) accurate and consistent with the scene? Unnatural or missing reflections can be a sign.

* **Object Interaction:** How do objects interact with each other and with the environment? Do they behave according to expected physical laws (gravity, momentum, collision)? Look for objects passing through each other, floating unnaturally, or exhibiting impossible trajectories.

* **Light Interaction:** How does light interact with surfaces? Are there natural highlights, specular reflections, and ambient occlusion? Unnatural lighting, flat rendering, or inconsistent light falloff can be problematic.

* **Background Cohesion:** Does the subject appear to be truly integrated into the background, or does it look "pasted" on? Check for inconsistencies in lighting, shadows, and focus between the subject and the background.

6. **Subtle Artifacts and Anomalies:**

* **Edge Blurring/Aliasing:** Are the edges of objects and subjects unnaturally smooth, blurred, or exhibiting stair-step patterns (aliasing) where they shouldn't be?

* **Color Bleeding:** Is there unnatural color bleeding between objects or into the background, especially around edges?

* **Motion Blur Inconsistency:** Is motion blur applied realistically, consistent with the speed and direction of movement and the camera's shutter speed? Unnatural or missing motion blur can be a red flag.

* **Temporal Inconsistencies:** Are there subtle flickering, shimmering, or jittering artifacts that appear and disappear over time, particularly in areas of fine detail or complex textures?

* **Repetitive Patterns:** Look for subtle, repeating patterns in textures or areas that suggest a generative process rather than organic variation.

* **Lack of Imperfection:** Real-world objects and scenes are rarely perfect. An overabundance of pristine, flawless elements can be a sign of artificial generation. Consider the absence of dust, smudges, natural wear, or minor imperfections.

* **Unnatural Object Placement:** Are objects in the scene placed in logically improbable or aesthetically jarring ways, suggesting a lack of understanding of spatial relationships or context?

* **Inconsistent Detail Level:** Does the level of detail remain consistent across all elements in the frame, or are some areas unnaturally sharp while others are excessively blurred, beyond what natural depth of field would dictate?

* **Texture Tiling:** Examine textures for visible seams or repeating patterns that indicate they were tiled rather than generated organically. This is especially common in backgrounds or on flat surfaces.

* **Surface Properties:** Do surfaces react to light and touch as expected? For instance, a metallic surface should have sharp specular highlights, while a matte surface should diffuse light. Unrealistic material properties can be a clue.

* **Camera Shake/Movement Realism:** If the video implies camera movement, does it mimic natural hand-held or stabilized camera behavior? Unnatural smoothness or jerky, non-physical movements can be indicative.

* **Depth of Field Artifacts:** If depth of field is used, is the transition between in-focus and out-of-focus areas natural? Look for abrupt shifts or unnatural bokeh patterns.

* **Fine Detail Dissolution:** In areas of rapid motion or complex textures, does detail dissolve in a way that suggests algorithmic processing rather than natural physics? For example, fine patterns might become overly smooth or lose coherence.

* **Object Boundary Blending:** When objects overlap or interact, is the blending of their boundaries natural? Look for halos, unnatural transparency, or a lack of occlusion where it should occur.

* **Subtle Geometric Warping:** Examine edges and lines for any subtle, unnatural warping or bending that doesn't correspond to perspective or lens distortion. This can occur in areas where generative processes struggle with complex geometry.

* **Consistency in Illumination:** Across different parts of an object or within a scene, is the illumination consistent with a single or plausible set of light sources? Inconsistent lighting can suggest compositing from disparate elements.