Portraits and performances need different space
For family portraits, discuss the number of people likely to stand on stage together and the route they take on and off it. A performance adds its own working space, equipment and access needs. The Goa stage with a patterned dance floor and the clock-themed Kerala performance show why the floor and the backdrop need to be considered together.
Ask what the camera will see
Describe the lighting you want in photographs as well as the effect you want guests to see. A bright backdrop and a dark face can coexist in the same room. Bring the photographer or film team into the lighting discussion, particularly where screens, moving lights or strong coloured light are proposed. Ask for a lighting check with someone standing where the couple or performers will be.
Use the room as part of the brief
A stage that suits a broad room may need different proportions in a narrow hall. Share the venue's usable wall width, ceiling restrictions and position of entrances before treating a photograph as a layout. If you like an arch or an illuminated shape, save that reference and identify the feature you want retained. Your final dimensions, materials and lighting plan should be agreed for your venue.