Green Screen or White Cove: Which Should You Book?

Studios are asked for green screen more often than green screen is the right answer. There are two ways to control a background: shoot against a seamless white cove and keep the background you shot, or shoot against green and replace it later. One finishes on the day. The other finishes in an edit suite, and the difference between them is measured in hours of somebody’s time.

This guide is about choosing before you book, because the choice changes the lighting, the schedule and the budget. At Scope the question is simpler than at most studios: Studio A is both the white drive-in infinity cove and the room used for green screen work, so you can book one room and decide set-up by set-up.

What each background actually gives you

A white infinity cove is a background with no horizon. Lit evenly it reads as pure white; lit less it falls to grey; lit with colour it takes the colour. Whatever you shoot against it is finished in camera — the file that leaves the studio is the file you deliver, give or take a grade. The limitation is that it is always a cove. It can be white, grey, a graduated wash or a block of colour, but it cannot be a street in Tokyo.

A green screen is not a background at all. It is a promise to supply one later. The camera records a subject against a flat, even colour, and compositing software swaps that colour for whatever you like — a photographed plate, a graphic, a virtual set. How to light a green screen covers the set craft; the point here is that the key is a cost you have chosen, and it should be chosen on purpose.

When seamless white does the job on its own

A surprising amount of commercial work wants a clean, neutral ground and nothing more. If the brief fits one of these, book the cove and keep the budget for the day itself:

• Product and pack shots, where the item is the subject and the background’s only job is to disappear. A product on white cuts out faster in a retoucher’s hands than it keys in a compositor’s.
• Fashion, lookbooks and performance, where the figure moves and the ground stays neutral. Movement is exactly what a key handles worst and a cove handles without complaint.
• Clean type-over and graphics: a presenter on white with text animated around them. The background is already the colour the designer wants, so there is nothing to replace.

The same cove will also go dark. With the blackout curtains closed and the light pulled off it, a white cove falls to a deep grey or near-black — a second look without a second room. For a saturated colour rather than white, Studio B’s colour-washable cyclorama is built for exactly that.

When a key is worth the post

Green earns its cost when the background cannot exist in the room:

• Impossible or expensive locations — a skyline, a landscape, a historic interior, anywhere a crew of twelve cannot sensibly go for one shot.
• Virtual sets and broadcast-style environments, where the background is a designed 3D space that changes between episodes or markets.
• Composites that put the subject into footage shot elsewhere, or several subjects shot separately into one frame.
• Backgrounds that must change in the edit: multi-language versions, regional variants, or a client who has not yet decided what sits behind the presenter.

If the background on your treatment is ‘somewhere we cannot bring the crew’, that is a key. If it is ‘white, or maybe light grey’, it is not.

A cove finishes the shot on the day. A green screen finishes it in somebody else’s diary — budget for the hours and for the wait.

Count post in hours, not pounds

Compositors are paid by the hour or the day, so the honest way to cost a key is to count the shots and the edges. A locked-off presenter with short hair and matt clothing against a well-lit screen is a quick key. Add a moving camera, flyaway hair, glasses, a glossy product or a second person, and the same shot can take several times as long — and those multipliers compound across every set-up on the day. Before you book green, ask whoever is cutting the piece to estimate the key time per shot and multiply by the shot list. Either way the number comes out, you will know before the day, which is when it matters. How to budget a studio shoot in London puts that figure alongside the rest.

The blackout argument

Whichever you choose, the room has to go dark. A cove needs an even wash that only you control, and a key needs the screen held at one value from the first take to the last. Daylight ruins both: a cloud changes the cove’s white point and the screen’s green alike. Studio A has full blackout curtains, so the only light on either background is the light you rig.

Hybrid days: white and green in one booking

The most useful answer is frequently both. A content day for a brand might want product on white in the morning, a presenter keyed into a virtual set after lunch, and a performance piece against a grey wash to finish. At Scope all three happen in Studio A: the cove stays white and the green screen is rigged as its own set-up within the same room, so you move between looks by changing what the camera points at rather than by changing rooms.

Plan the running order so the lighting changes are few: shoot the white set-ups together, then rig the green. Rigging the screen, lighting it flat and pulling a test key all sit inside the booked time, so a hybrid day is a full-day booking at £620 rather than a half day at £320, and the two-hour block at £160 is for a single locked-off set-up only. Whether the screen is supplied or you bring your own is confirmed when you enquire; we have not published a kit list, so ask rather than assume. The FAQ has the short answer.

Lights follow the same rule in every room but the DJ room: they are charged separately from the room rate, so please enquire about our lights and we will quote for what your shoot needs. Tell us you are keying, so the quote covers an even wash on the screen as well as the subject.

How to decide from the brief

• Write down the finished background for every shot. ‘White’, ‘grey’ or ‘a colour’ is the cove. ‘A place’ or ‘a graphic environment’ is green.
• Ask the editor for key hours per shot and multiply by the green shots. Add it to the day rate before you compare.
• Check wardrobe and props for green, fine mesh and gloss. Any of them pushes a marginal key back towards the cove.
• If the list has both kinds of shot, book Studio A for the full day and schedule white first, green second.