Use a quiet room with bright, soft, even lighting to avoid harsh shadows.
For high-end production, "preparing a feature" involves , where every nuance of a human actor is recorded to drive a CGI model.
If you are preparing a feature for a video (like a talking head for a tutorial or ad), the focus is on recording a high-quality sample to train the AI.
The process for preparing an avatar "feature" depends on whether you are working with digital AI avatars, mobile app features, or film-style performance capture.
Use a smartphone or camera (4K at 30fps is ideal) rather than a webcam.