Where the sheer layer begins and ends
Coverage and transparency vary by design: an illusion panel can form the whole upper neckline or fill only a small opening. Its color, seam and edge determine whether it blends into the bodice or reads as a distinct layer. A close-fitting underlayer can change how much the sheer panel reveals.
Pattern and placement
Lace or beadwork may sit on the mesh, continue onto the bodice or end at a clean border. The relation between motif and silhouette appears differently at close and full-length scale. A high sheer panel creates a different effect from a small insert at a plunge; some high-neck wedding dresses use this treatment.
Sheer coverage can be elaborate
Bernarda extends botanical embroidery through long illusion sleeves and an elevated sheer neckline, with a sweetheart line visible beneath. Darla combines the illusion and high-neck tags with Chantilly lace and tulle. The boundary between transparent upper fabric and the structured dress beneath helps shape the neckline as much as the motif does.