seen from above trade show exhibition booth design 20x30 foot footprint height of walls 12 architectural spatial study clear front edge aligned to aisle open space but not all visible from entrance architectural promenade art gallery feel human scale neutral monochrome palette conceptual model aesthetic no signage no branding no decorative elements no furniture focus no product display soft diffuse lighting reserve 55 square feet for enclosed area one main entrance 10 to 12 feet wide arch one exit 8 feet wide conceptual space to draw people in design oriented on a corner create a 10x10 feet landing space at the entrance with reception desk inside a showstopper kitchen space