The purpose of each of the light sources (except led tool for the accent) - the transfer of both th

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It is believed that in portrait photography, there are five sources of light: painting, filling, background, and the backlight modeling. led tool I will take the liberty to add two more: light hair (of course that the light is only used in portrait photography), and accent. Indeed, it seems that the backlight illumination is identical to the hair, and modeling light - the essence accent. However, from my point of view, it is not so, because these light sources specifically designed for different purposes, and not just a name. However, the gist of the article led tool is not the case ...
The purpose of each of the light sources (except led tool for the accent) - the transfer of both the subject (in the case of the portrait is a model) and the whole picture. Indeed, on a plane or a print screen, we can see objects protruding or vpuklymi (hmm ... yeah ... the odd word ...) only because of the light. The transfer led tool of the main, but not the only function for some light sources. So, for example, draws light provides led tool exposure, fill light significantly affects the mood of the image (in the key of "lyric - dramatic"), and the background can control the viewer's led tool attention. led tool
The transfer of bulk image affects not only light. This choice of storage medium, method of printing images, the kind of photo paper, the model of the lens. However, if the original light gives a flat image, further efforts to transfer the amount to shoot the subject will be negligible.
The above IP are divided into two groups: basic (painting, filling, background) and additional (the backlight, light hair, accent, modeling). Why is that? In the academic literature on the production of light in the photo, led tool I have met the following explanation: "Three led tool main light source is needed to create the illusion that the photo is taken indoors with natural light from the window." And then I happened long stupor why if you shoot in the light of the window, the light source (window) may be the only one, and if you put the studio lighting, they need three? This is illogical and unscientific. Probably, I thought, led tool this provision is incomprehensible to my meager mind.
The knowledge came upon me late. After many years of shooting in the studio, I asked myself, "What is special about the photos, if done with a single that draws a light?" Answer: The image in the photo is not the way I saw it through the eyes of space. Even if the photograph with the light from the window (photo 1). The reason for that - limited fotoshirota media onto which the shooting, compared to the power of this vision. Simply put: our eyes to the best extent distinguish contrasting led tool themes, rather than film or digital camera matrix. And this leads to the following consequences.
Photo 1: deep shadows and dark background with light from the window. Photo 2: deep shadows led tool and dark background when shooting with a single light source. Photo 3: lighting scheme with a single IP. Photo 4: portrait adapted to our idea of light in the interior.
1. Shadows on the pictures look too dark, until the loss of detail in shadow areas (photo 2). Hardly ever, eyes, we do not see in the room is so deep shadows. And if we wanted to get a photo shadow led tool familiar to us the depth, then we need a fill light, by which is achieved the level of shadows, which we find a natural interior.
2. Background underexposed, if the model is at a distance from it. This stems from the "inverse square law," which applies to light. His point: if the distance from the key light to the subject to double, the illumination will decrease by four times. For example, if the distance of 2 meters from the model and the model of the background to the same 2-meter, the background luminance is lower than four times or two-stage (Fig. 3). And if you look at the eyes on the wall behind our model of dilated pupil and the brain "will strengthen the signal," and we will take the wall of the lightness, and about which she has, in a photograph that does not happen - the inverse square law will be fairly fixed camera. To return the lightness of the walls, the background, which we have seen with our adaptive vision will need the background light. Of course, if the model is close to the background, the background shading slightly, and the use of ambient light does not make sense.
Summary. Thus, with the three major IC, we can make a picture that is similar to our understanding of the natural, typical of light in the interior (photo 4). In other words, we are bringing the possibility of photographic equipment to our adaptive vision.
Additional light sources provide light drawing unusual led tool for the interior. Photographer resorted to