With the rise of 3D video, movies, TV shows and video games, many people want a better stereo video experience, but 3D lighting is a whole new field.
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Although there are more and more affordable 3D cameras released, it is important to note that the usual lighting environment is no longer suitable for today's 3D cameras. How to use the better lighting environment to shoot the best 3D movies? The cost-effective HD camera ushered in HDTV, which is the next step in digital film and video production, but it has encountered a series of new challenges. Due to its higher resolution, the focus becomes more demanding, and photographers should pay special attention to this, as well as 16×9 shooting and 4×3 full-screen shooting compared to our many years of operation. The lighting requirements have also changed.
Many producers and videographers have learned that switching to stereoscopic 3D digital production will encounter more challenges than HD production. How much light does the 3D camera need, as well as related lighting technology and monitoring.
3D lighting needs more lights
3D lighting and production expert Bernard Mendiburu is the author of 3D Video Production Guide and 3D Film Production. He summarizes the most important rules of 3D production: getting as much light as possible. The camera needs as much light as possible through the lens, mirror and sensor. Using more lights will cost you more, but don't be surprised. Because, this is all that is necessary for your project, if you want to get the best 3D video. Of course, it's hard to tell exactly how much light is needed for a good 3D video.
3D lighting actually has many unique challenges, most of which involve high contrast light. In 2D shooting, no matter the numbers or movies, there will never be bright spots and dark spots, set through the light or the scenery design. But this form of filmmaking will not be possible in 3D video.
The current technology, from 3D acquisition to cinema performance to 3DHDTV broadcast, has many problems, the high contrast and light of the bright and dark spots are inconsistent. In a single shot, when the light is very bright and the shadow is very dark, a "ghost" (double) image appears. This is why 3D lighting needs to be highly consistent. Use less foreground and background to help create the depth of field of the shot.
"You need more background light, artistically, to remove shadows from dark dots. - He suggests that all-bright or full-dark images in 3D video lose clarity and therefore become monotonous. Use appropriate lighting The technique that will determine the shape of the shadow so that the image gets a greater depth of field will help avoid ghosting images.
As for the full-bright image, the reference is a set or a room at home or a white and black wall. According to the 3D lighting tutorial, the general rule in any type of film or TV and video production is to avoid white or light colored walls. Instead, using colored pictures or painting on the wall to avoid bright or dark colors is no longer "flat".
Most 3D lighting tutorials will tell you that if you use a new, more affordable consumer-grade 3D camera, you will encounter more lighting problems. Bernard recommends "more incident light, technically through the lens and filter, through the "pinhole" 3D lens."
When he mentioned the "pinhole" 3D lens, "Bernard talks about how these consumer-grade 3D cameras can have 2D capture built in, or just attach a 3D lens. They need more light than more traditional (more expensive) 3D cameras. With a 3D lens, the maximum aperture is F3.2, which means you need 28 lux of light, compared to 2 lux in 2D! This is a huge light ratio.
Smaller sensor HD and 3D cameras, small chip 3D cameras, even those that may have dual sensor settings, not to mention the fact that clearer high resolution lenses require extra light.
We also talked to photographer and editor Tim Dashwood that his stereoscopic 3D toolbox MacOSX plug-in provides a comprehensive solution for Apple's FinalCutPro, FinalCutExpress, Motion and AdobeAfterEffects, which can be used for 3D material processing, and he also gave some Additional suggestions.
“The spectroscopic 3D device uses 50/50 lenses, which means you lose at least one stop of transmission,†says Tim. “One stop is usually not an important factor until you start shooting high speed or short shutters (slow When the action is made, the beam splitter will also cause distortion and color change, which will be toned in the later stage. â€
Tim also recommends avoiding lens flares, as seen in the latest Star Trek movie. He explained, “First of all, each lens reacts differently to the flash. Secondly, even if the lens is well matched, the spot appears and the flash phenomenon coincides with the shot, not at the scene.â€
"So the spot caused by the light is at the back of the scene, and the person is standing in the middle scene. When looking back at 3D, the spot obscures everything in the scene because it happens on the lens, but its disparity value indicates that it is "in After the scene, the result is that the spot appears to "pass through" the person at the scene.
Post-production advice
So, by adding more light to the dark spots, be careful of those ghost images and avoid flat material. But what if the producer or videographer tries to make a horror movie or a thriller?
Everyone knows that in movie lighting, comedy and family movies are bright and attractive. TV shows are more natural. As we mentioned above, the lights of thrillers and horror movies are often dark. This is the creation of an editor or colorist, creating a dark background by using color correction tools and plug-ins instead of "flattening" the content. It needs to be practiced to make it look natural and not flat, so color correction and grading are more important than ever.
to sum up
Using these light tips will ensure that the producer and the photographer get the best material from the 3D camera. Ample light is necessary, but the end result will be a huge three-dimensional experience. And don't forget that practice makes perfect!
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