A face beside a window can look cool on one side and warm on the other when room lamps remain on. A single white-balance adjustment may not make both sides look the same. Mixed lighting is easier to manage when you decide which source will lead the scene. Start by switching sources off individually and observing what each contributes to the actual camera image.
Separate the sources before correcting colour
Make a brief recording with the window as the main source and another with the relevant room light alone, where the setup permits. Keep track of camera settings so the comparison is understandable. Notice which source lights the face, which lights the background, and whether one introduces an unwanted colour patch.
The practical choice may be to turn off a nearby lamp rather than add another. If the window gives a useful result, arrange the presenter to benefit from it. If the session needs consistent artificial light, use suitable curtains or another agreed method to reduce the window’s influence without blocking necessary ventilation or access.
Set white balance for the chosen arrangement
Follow the camera’s method for setting white balance, using an appropriate neutral reference when required. Make the setting under the light that will illuminate the subject. A reference placed in a different corner of the room can describe a different mixture of light.
Check skin, neutral objects, and the intended background in the recorded image. White balance can address an overall colour bias, but it cannot necessarily remove different colours falling on opposite sides of a face. If that remains distracting, simplify the sources or reposition the subject before planning a complicated correction later.
Watch for changes over time
Clouds and the sun’s position can alter a window-lit scene during a long explanation. Record sections when the conditions are suitable, or choose an arrangement with less dependence on daylight. Note the setup used for replacement lines so they can be matched more closely.
Before continuing after a break, compare the camera preview with a reference frame. Check brightness as well as colour. A lamp described as daylight-balanced does not guarantee an exact match to every window condition, and dimming or diffusion can change the practical appearance of a setup. Make a new short sample whenever a meaningful part of the arrangement changes.
Choose a lighting plan you can maintain for the length of the recording. Save a reference image and write down which lamps were on, how the window was controlled, and the white-balance setting. Those details are more useful for a later pickup than simply remembering that the scene used natural light.
