Most events need a backdrop for one of three jobs: a photo moment, a stage picture, or a brand statement. The right construction follows from the job.
Step-and-repeat
The workhorse of red carpets and entrances. A printed or fabric wall with a repeating mark, sized so every photo includes the brand. Common widths run 8 to 16 feet; 8 feet of height covers standing photos comfortably. It needs even front light and a few feet of clearance so guests aren't pressed against it.
Hero wall
One large statement behind the main moment: a keynote, a product reveal, a head table. Hero walls reward dimension, layered panels, recessed lighting, a logo that's built rather than printed. This is where fabrication earns its keep over a flat print, because the wall reads as an object on camera, not a poster.
Scenic builds
Anything the audience walks through, around, or inside: arches, tunnels, product plinths, themed vignettes. Scenic work is fabricated to the concept, so the brief matters more than the catalog. Bring references, a floor plan, and the load-in window, and the design follows.
Whichever direction fits, ask early about rigging points, floor protection, and fire rating. Venues care, and retrofitting compliance the week of the show is the expensive way to do it.