Aisma starts from the visible scene in your existing video. You describe the background change in words; a green-screen workflow is not required.
Do I need a reference image?+
No. This example uses a written request. You can optionally add reference photos to guide a particular visual direction.
What about reflections and light?+
A different setting may need new reflections, shadows and lighting. Describe what should remain recognizable and review those details in the final result.
Can I export a transparent video background?+
This workflow generates a new visible setting. It does not export an alpha channel or a transparent-background video.