Therefore, you need to choose the HDR format.Īll we need to do is play with the brightness to illustrate the difference between JPG and HDR fileĪs you can see, JPG on the left has absolutely no details in the bright areas. The problem with the LDR image that it is limited to a relatively small range of luminance values from 0 to 255, which is insufficient for the illumination in 3D. They store 8 bits of data for each of the red, green, and blue channels for each pixel. I call the most part of the photos and pictures as LDR images or pictures with a low dynamic range. “Dynamic range” is the amount of data about the brightness of the image such data is the much larger amount of the information than the human eye is able to catch. For example, the use of an incorrect focal distance or a slow shutter speed. Creating high-quality HDRI from scratch is a difficult task that requires very specific equipment and meticulous attitude to the entire process. The easiest way to light a scene in the CG is the use of HDRI. HDRI is a panoramic photo, which covers all angles from a single point and contains a large amount of data (usually 32 bits per pixel per channel), which can be used for the illumination of CG scene.Ī simple 3D scene, which was lighted only with HDRI: The second part will be provided in the upcoming days and will describe step-by-step instructions on how to create the HDRI. This article describes the basic concepts and the necessary equipment to create own HDRI.
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