
Concatenate along dim 1 (the scanned axis).
g_concat_t.RdMatrices are treated as single (1, y, x) slices, so a scan's stacked buffers and a final plane concatenate directly.

g_concat_t.RdMatrices are treated as single (1, y, x) slices, so a scan's stacked buffers and a final plane concatenate directly.