Coca-Cola and OpenAI both raised their US billboard spend by $2M+ last quarter. So did Pepsi, Uber, eBay, and Capital One. $2.12B quarter, twentieth straight of growth. The step that hasn't kept pace is showing a client what actually goes up. Every campaign on that list had to be comped first: artwork mocked onto a highway sign, a shelter panel, the side of a building, so someone could see it in place before committing budget. When that step is expensive, only the concepts a team is already confident in get shown. The rest aren't rejected. They're never presented. We published a workflow this week that takes one poster and returns three placements in a single run, each with its own scene prompt, under one shared control for time of day and lighting. The parallelism is the part worth noting. Holding one variable constant across three branches while the others differ isn't something a model gives you. It's a property of the pipeline.