As the use of 3D virtual garment simulation expands in fashion design, virtual fashion presentation, and product visualization, understanding how users perceive garment movement is a critical and underexplored area. This study investigated users’ visual perception of and preferences for virtual clothing in dynamic contexts by analyzing the perceived naturalness of virtual flared skirts in motion. A 3 × 2 × 2 factorial design was employed to create 12 videos, with skirt length, wind effect, and walking speed as independent variables. Data were collected from 139 participants who evaluated the videos based on perceived naturalness, harmony, reality, flexibility, and preference. Walking speed and wind had statistically significant impacts on visual perception, with slow walking speed rated more highly. There was also an interaction between skirt length and wind, as short skirts were more highly rated than longer skirts in windy conditions. A multiple regression analysis indicated that perceived harmony was the strongest predictor of preference. In sum, simulation parameters such as walking speed and wind effects should be carefully calibrated to optimize the visual quality of virtual garment presentations. The findings contribute to foundational research for optimizing the dynamic presentation of 3D virtual garments, including flared skirts in particular, in both academic and practical contexts, including virtual fitting, digital fashion content, and e-commerce applications.