Christmas Princess Gown Transformation Effect

Preserve the subject's original facial features and body proportions. Apply a glamorous Christmas-themed evening gown transformation: the gown gradually forms around the subject in a natural, cinematic way, with flowing fabric, subtle sparkles, and soft folds. Red, green, and gold colors dominate, with tiny Christmas lights, snowflake patterns, and decorative holly subtly embedded on the dress. A soft glittering aura or particle shimmer radiates gently around the subject, enhancing a magical 'princess transformation' feel. The subject can lift a hand slightly or turn their head during the transformation, showing subtle, natural motion. The background remains consistent, softly lit, emphasizing the gown and festive elements. The final pose is elegant, regal, and festive, like a Christmas princess ready for a gala.