Overview
External integrations add installation complexity. A successful custom-node install does not guarantee that face-analysis models, ControlNet files, adapter files, or runtime dependencies are present.
The InstantID graph requires many connections. Poor layout or unlabeled nodes can make errors difficult to trace.
Identity strength is a trade-off. Stronger or longer influence may improve fidelity but gives the reference face more control over the generation. Lower influence allows more freedom but may weaken character consistency.
Model ecosystems differ in maturity. The basic ComfyUI concepts transfer, but a workflow built for SDXL cannot be assumed to work unchanged with Flux. The model, text encoder, sampler, and extension availability may need adjustment.