The parallel polarization images aren't very useful for creating textures but they reveal a lot about making shaders for representing skin. Specular Highlight The first light, where the photons hit directly and bounce back towards the source, is the brightest light. The specular light reflected reveals much finer details than the diffuse and scattering component of the cross polarized image. This is expected but it's pretty interesting to see it in practice.Īnother interesting observation is the difference in the appearance of details between parallel polarization and cross polarization. All images were taken using the same exposure and white balance yet when the light is at a glancing angle you see more specular response and the color is closer to the color of the light. When this light hits a subject, the reflective light bounces back into the camera. This shows lighting that is directly reflected from the surface. A specular highlight is the bright spot of light that appears on shiny objects when illuminated (for example, see image on right). Description: Specular light is a light that retains its reflective qualities. The result is an image of the face with very little directional lighting and no specular highlights.īelow is a combination of similar photos but without polarization, here you can see why polarization is required.īelow are 15 images taken with the lens polarizer rotated 90 degrees which places it in parallel with the light. Specular highlights are perfect reflections of your photographic light source - think catchlights in your models eye. A skilled photographer should know the difference between hard light and soft light, how to. Lighting creates a visual mood in a photograph, and in photography, there are two main types of lighting: hard light and soft light.
Specular light photography how to#
Some touch up is required to the eye areas as they still get a faint specular highlight so erasing the highlight from each image is required. Learn How to Create Both Hard Light and Soft Light. The result is the brightest pixel from each image, eliminating shadows. These photos are aligned and blended in photoshop using the blend mode Lighten which returns max(x,y). Cross polarization is a technique that uses two polarizing filters one on the light source and on e on the camera lens to get rid of unwanted specular reflections. These are the 16 photos taken in a 180 degree arc.
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