One sideways pan in. A panorama whose viewpoint you choose afterward.
One sideways pan in. Every output column is sampled from a single source frame; the sampling mode decides which column per frame, so projection and viewpoint stay adjustable after capture. The dial shifts the base column.
X-slit is incidentally stereo: depth survives in the slope of each feature's trail across the frames. Reading it back is the next step — not built yet.