As well as the general principles of cinematography like three-point lighting, short key and so on, there are specific principles that apply to certain situations only. Since these situations don’t always come up, it can take a little longer to develop a mental toolkit to get the best out of them. One such situation is shooting water – scenes by riversides, on beaches, beside swimming pools or in bathrooms. What are the tricks you can use to get the most cinematic look?

 

1. Use a circular polarising filter

A polarising filter cuts out all light waves except those travelling in a certain plane. Since reflections are usually only in a single plane, by rotating a circular polariser filter until you hit the right angle, you should be able to reduce the reflections you’re seeing. This can have an impact on how water appears on camera. On an overcast day, a CP will allow you to reduce the reflections of the grey sky, making the water look clearer and bluer.

 

2. Get sparkly

Water will always look prettier, particularly large bodies of it, if the sun is sparkling on it. How do you capture this on camera? Use the principle that the angle of incidence equals the angle of reflection, the same principle you use when positioning a bounce board. As with all day exteriors, shooting at the correct time of day is critical. You want the sun to bounce off the surface of the water and into your lens, which means being on the opposite side of the water to the sun, with the camera facing the sun. Use a top flag on your matte box (a.k.a. “top chop” or “eyebrow”) to prevent lens flare if you so wish.

 

3. Get rippling light

The same principle can be applied to capture rippling light effects on walls, faces, etc. This time you want the sun, or artificial light source, to bounce off the surface of the water and hit your subject. You can suggest an off-camera body of water when there is none by carefully positioning a fish tank, paddling pool or similar in relation to the light and your subject.

 

4. Kill the bottom bounce

Beware that not all the light will bounce off the surface of the water. Some will pass through it, bounce off the bottom of the pool and then hit your subject. If the bottom of the pool isn’t a dark colour, this unmoving bounce light will overpower the rippling light coming off the surface. Lay duvetyne or other black fabric on the bottom of the pool so that the only bounce is from the surface.

 

5. Fake it

If you need to create a rippling light effect without using water, you can fake it with a sheet of blue gel on a frame in place of the water surface. Wobble the frame slightly (only slightly, or the sound department will start to yell at you) and the gel will ripple in the frame, creating a similar effect to water. Thanks to my key grip on The Little Mermaid, Jason Batey, for introducing me to this technique.

Another way to simulate watery light is to bounce a lamp off silver paper or fabric which is being rippled by a fan. More on this technique here.

What about shooting UNDER water? Just one tip for that: hire an underwater DP.