Author: Jeffrey Okun

Jeffrey A. Okun and Susan Zwerman

Jeffrey A. Okun is a prominent Visual Effects Supervisor who has supervised high-profile visual effects–heavy feature films for over 30 years, and is currently Chair of the Visual Effects Society (VES). Susan Zwerman is a highly respected Visual Effects Producer who has been producing visual effects for more than 20 years. She is also a well-known seminar leader and author.


Posts by Jeffrey Okun:

Exposure on the greenscreen

Greenscreen Exposure


Let us assume that the camera choices are optimal, screen materials and lighting are ideal, and the foreground lighting matches the background lighting perfectly. A common misconception is that backing brightness should be adjusted to match the level of foreground illumination. In fact, the optimum backing brightness depends only on the f-stop at which the…

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