Pick a room, drop in your portraits, download the preview. No Photoshop.
Drop an image onto a frame or click it. Drag to reposition, scroll or use the slider to zoom. Frame not lining up? Click Adjust frames, drag its corners to fit, then Export library to save.
Easiest: in your mockup, fill each photo opening with a solid magenta or lime-green block and upload that — the zones are detected automatically and the blocks are cleaned off. Or upload a clean room and click-drag on the image to draw each opening. Fine-tune any zone later with Adjust frames.
rooms.json manifest and an image folder (it auto-loads ./rooms.json if present). Build your collection here, then Export library to save it.