Use one consenting adult per photo, with an uncovered face and even light. Avoid sunglasses, strong beauty filters and tiny faces inside group pictures. For the default Chuttamalle AI video, the first slot maps to the male lead and the second to the female lead, even when they change screen positions.
One uploaded portrait changes one role; an empty slot leaves the other performer in the source. For your own two-person clip, the slots map to the initial left and right performers. Start with a clear short section before trying a faster passage. Exact likeness and choreography are not guaranteed.