FLUX.2 Klein Identity Feature Transfer Advanced

FLUX.2 Klein Identity Feature Transfer Advanced is a new node for ComfyUI that extends the original identity transfer tool with granular control and an optional subject mask. It allows users to steer identity features per-band using parameters like double_strength (0.15 to 0.6) for early block intensity (pose, color, identity), single_strength for later blocks (style, texture), and a block_schedule (flat, ramp_down, ramp_up, peak_mid) to control which blocks are active. The sim_floor parameter sets a cosine similarity threshold: low values (0.05) give a wide pull and tight identity lock, while high values (0.4–0.6) allow the model more freedom. The headline upgrade is the optional subject_mask, which restricts identity pull to only the painted area of the reference, preventing background or unwanted subjects from bleeding into the generation. The mask does not modify the reference latent, so the model retains full scene context and attention freedom. Combined with sim_floor, users can dial from full identity lock to loose, creative edits.