CATALOG. HDRi. reference and support

Transcription

1 CATALOG HDRi reference and support

2 Note: This catalog was created on 09-Sep-2014 and may be outdated. Download the pdf updated:

3 Urban Clear Sky DESCRIPTION INCLUDES - These HDRi can be used in any 3D program (3ds Max, Maya, C4, etc). - Radiance (.hdr) panorama in 2 sizes (10000x5000 pixel and 1024x512 pixel) and - The height of the sun above the horizon is 23 (0 being the horizon and 90 overhead) OpenEXR (.exr) panorama in 2 sizes (10000x5000pixel and 1024x512pixel). - With these HDRi not need additional light to create sharp shadows. - 9 background images in DNG (Raw) and JPG format (profile AdobeRGB color and 16 - These are the panoramic HDRi spherical type and 180ºx360º. bits). - Time that they made the photos 17:02 - Total of 22 files in a compressed zip approximately 550 Mb - Height from floor to center point of the camera lens: 120cm. - Dynamic range HDRi 13 EV. - Background images in DNG and JPG (color: adobergb, 16 bits) formats and are open from Photoshop version CS3 or higher, or Lightroom version 2.1 or higher. - Background images were made on the same date and time the hdri.

4 Example HDRi Urban Clear Sky and Backplate Note: The car example photo is not included.

5 USE Place the HDR in the materials section as Spherical map type. Depending on the rendering engine horizontal or vertical rotation of HDR can be as Offset U / V (0 to 100) or rotation H / V (0 to 360 ). More information and tutorials using the HDR in my blog: - 3ds max and VRay light type Lightdome: - 3ds max and VRay light type Environment - 3ds max and Maxwell - Lightwave and Maxwell More information and details about the HDRi in my blog: WHY IS AN HDR HIGH RESOLUTION AND OTHER LOW RESOLUTION OF THE SAME HDRI? The low resolution HDRi is to optimize load HDRi on the scene if only used as lighting. The HDRi used to illuminate a 3D scene; for reflections and the background scene. If it's just to light, it is not necessary to load a high resolution HDRi because it consumes memory only just one of 1024x512 pixel and the same quality of light you get with one of great resolution. However, for reflections and background if a high resolution HDRi necessary. By reducing the resolution (dimensions) of a HDRi with Photoshop or any image editing program, sometimes HDRi loses some of its dynamic range so that it retains the dynamic range has to be generated from the image sequence capture original, which is why I included a low resolution HDRi generated from the original, thus maintaining its real dynamic range. DYNAMIC RANGE CHECKING IN PHOTOSHOP Open HDR with Photoshop, in the bottom left you will find a scroll bar, move the center indicator to the left to see underexposure and overexposure to the right of the HDR. The visual appearance of HDR in Photoshop does not affect the lighting within the scene. Visit my blog for more information regarding this topic: HDR WITH SHARP SHADOW Some rendering engines make sharp shadows without assistance of any kind of additional lighting such as VRay. In the panel material, decreases the value of gamma to darken the shadows and edges define a value of 0.75 is recommended. Defined shadows also depend on the quality of the HDR (EV capture) and if the picture has an intense light source such as a panoramic HDRi where you see the sun. Read this tutorial on my blog about sharp shadows: WHY IS GIVEN HEIGHT FROM FLOOR TO THE CENTER OF THE CAMERA LENS? When the HDRi is placed in the viewport as background image, 3d camera must have the same height from the floor of the camera that took the HDRi, so that when the models are placed in the scene, they appear as if they were actually in the floor. Please see the following tutorial about camera placement using HDRi: giancr.com