In the disclosed systems and methods for competitive scene completion, a user selects from among one or more affordances, each representing a different challenge and comprising a scene image and plurality of markers. Each marker has independent scene coordinates and a type. The scene and markers of the selected challenge is displayed. For each user marker selection, corresponding furnishing units are displayed. The units match the marker type and include units retained and not retained by the user. User unit selection results in display of a graphic of the selected unit at the corresponding coordinates within the scene. The scene is thereby populated with graphics. The unit selections are submitted upon satisfaction of a challenge completion criterion specifying which scene coordinates must be populated. Responsive to submission, the user unit selections are subjected to community vote on a remote server and the results are provided to the user.