Bring the prep you already wrote on RoleCall to Foundry, all ready when you sit down to run. Every RoleCall scene arrives as a Journal Entry: read-aloud text, your GM notes, and a page for each NPC, encounter, loot cache and magic items all in the same scene note. Your campaign lore notes come across too.
Your table sees the just read-aloud items: each entry is split into player-safe pages and GM-only ones, so handing the party a scene mid-session shows them the boxed text and nothing behind it. Not the NPC's real motive, not the encounter, not what's in the chest.
It does not import maps. A RoleCall scene is a prep bundle: read-aloud, notes, a location, NPC notes, and all the other goodies you need to think about when running a session. It carries no map art to bring over. If you came looking for scene backgrounds or maps, this is not that module.