Live3D Face Swap: Multiple vs Batch modes, which to use

The guide draws its main distinction from a simple scenario: one group photo with three people versus three separate photos of one person each. Both involve three faces, but the group photo is handled by Multiple Face Swap, where you select which positions to change and assign a reference face to each, while the three separate photos go through Batch Original Faces with a single shared reference. Mixing these up—uploading multiple photos into Multiple Face Swap, or expecting Batch to assign different faces within one group shot—is the mistake the guide warns against.

For group photos, Live3D recommends keeping the number of faces at five or fewer as a guideline for better quality, though it is not a strict limit. The guide also suggests checking each position-to-face pairing before generating and reviewing the output for swapped identities or unnatural outlines. For batch work, it advises testing with two or three clearly different source images first—varying head angle and lighting—before processing the rest.

The upload limits differ by mode. Batch mode accepts up to 10 source images per run, each up to 20MB, with a shared reference face capped at 2MB. Single-photo mode supports PNG, JPG, JPEG and WEBP, with each of the two input images up to 20MB. Video Face Swap accepts MP4, MOV, M4V and GIF up to 100MB, with a reference photo up to 20MB, and free video processing is currently limited to 10 seconds. The guide notes that free-use conditions for video, multiple-face and batch modes should be checked on their own pages rather than assumed from the single-photo mode.