We do recommend foundation for women to even out your skintone.
Women:
Foundation can be applied a little heavier for studio lighting. Blend it well at the jaw-line so that there is no delineation between the face and the neck.
Eye makeup should also be well blended (avoid sharp lines between colours or white highlights)
Men:
Shave as late as possible before the sitting to avoid “five o’clock shadow,” but if you have sensitive skin, you may wish to shave earlier in the day to avoid redness.