Recently, the term HDR in computer graphics has become quite popular and has confidently entered the dictionary of standard CG terms. But let's first look at the theory behind HDRI, and only then move on to practice. In this tutorial, we will see what HDR is and how to render HDR images, as well as how to control the gamma and exposure of rendered images at any time after they have already been rendered. But in any case, if you use another 2D editor, make sure it is capable of processing 32-bit images. The choice of 2D editors is less versatile because Photoshop is the industry standard and there aren't many alternatives on the market. Just ignore the specific names of the 3ds Max and V-Ray settings and find similar options in your native 3D software. If you use other software, such as Blender, Maya, Cinema 4D, etc., with any other render engine, you can still easily reproduce all the steps described. However, in order not to be completely abstract, for ease of perception, the whole process is shown on examples of 3ds Max & V-Ray as a 3D editor and renderer engine, and Photoshop as a 2D editor. You then open a saved HDR image in the 2D editor of your choice, perform the final adjustment, and finally save an adjusted image in a standard image format that you can use as usual. jpg, but in a special HDR format that contains millions of possible values for each color. Then the rendering ends, you save rendered image not into a standard image format, such as. In short, you render an image as usual in 3D editor and rendering engine of your choice, but without color clamping (compression of the full estimated color value from millions to only 256 possible values). Some Photoshop plugins, however, are software that needs to be downloaded and installed separately on your computer.HDR rendering technique is 3D & 2D software independentīefore proceeding, it should be said that the technique of rendering and post-processing of HDR images, that will be described below, is very general.
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