This is non-negotiable. Place Reflection Planes on major flat surfaces like glass windows and polished floors. Without these, your reflections will look distorted or "baked in."
Use Real Skies (introduced in earlier versions but perfected in 10). Choose a cloudy sky for soft, shadowless lighting, or clear for crisp shadows. lumion 10 realistic render settings
Set to High or Ultra . This adds realistic, ambient indirect light, filling in dark shadows. This is non-negotiable