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Auto mode handles 85 percent of photos. Manual fixes the tricky ones. When to click and when to paint.
I removed backgrounds from 30 product photos last month. For 25 of them, Auto mode handled it in one click. For 5 of them, Auto mode made a mess. Those 5 taught me more about background removal than the 25 that worked perfectly.
Auto mode uses BRIA RMBG. It works on about 85 percent of photos. It fails on subjects wearing clothes that match the background, fine details like wispy hair, and transparent objects. If the AI cannot tell where the subject ends, it guesses.
Counter-intuitive: Auto mode is better with busy backgrounds. A subject against a plain white wall is harder than a cluttered outdoor background. The AI needs contrast to find edges.
Paint green on areas you want to keep. The AI preserves those areas while removing everything else. Paint a few strokes on the edges the Auto mode got wrong. The background remover costs 2 credits. Auto for most photos. Manual for the tricky ones.