The primary visual element and core structural focus of the photograph must be lines – whether straight, curved, diagonal, parallel, or convergent.

Focus: Judging emphasizes graphic impact, symmetry, rhythm, minimalism, and the way lines guide the viewer's eye through the frame. The theme encourages finding lines in various structures: in architecture (bridges, facades, staircases), nature (landscapes, branches, rock strata), urban spaces (roads, rails, wires), or through abstract plays of light and shadow.

Style and Adjustments: All genres are permitted. Monochrome (black and white) photography is highly popular in this category as it emphasizes form and contrast, though color entries are equally accepted. Standard post-processing is allowed.

Not Allowed: Images where lines are merely incidental or minor elements within the frame that do not define the composition. The use of Artificial Intelligence (AI) or third-party graphic elements is prohibited.