Hdr extensions stand for High Dynamic Range image files. These may be opened by Photoshop CS3 software.
These are image files that include detailed light information. Generally these are used at the stage of render with 3D softwares.
For creating HDRI images, at least 3 or 4 photos should be taken for different light values. Then, these images should be combined in single file by HDR Shop or Photoshop CS3 softwares.
There are different web pages that allow you to download free HDR images.
What to use hdr
which page related to hdr file
hdr Related Searches
You can check related links about hdr fileextension.