The images for these are split into the part that is rendered behind guests walking under it and then the part rendered in front of guests.

Eight images, starting facing front-right and rotating clockwise (for each angle, it's the "behind" image and then the "in front" image)

scrollingMode : integer

Scrolling mode of the sign

price : integer

The cost of building this object.

hasPrimaryColour : boolean

True for objects that have at least one remappable colors.

sceneryGroup : string

OpenRCT2 id of the primary scenery group this object should be included in.

rct2.footpath_banner.bn1 (Sign)

    "properties": {
    "scrollingMode": 17,
    "price": 250,
    "hasPrimaryColour": true
}