"A capabilitiy called image-based lighting (IBL) takes the guesswork out of lighting for novices. Using IBL, the user wraps a high-dynamic range (HDR) image around the model. HDR is an image format used for settings such as rooms or courtyards, and includes the correct lighting and color to generate the right reflections. The HDR image becomes the background for the model, which eliminates the need for users to manually position light sources. By using an HDR image, novices can instantly take advantage of expert lighting for use in their renderings. HDR images are easy to find, as there are millions of these images available for purchase or download via the Internet."
So get some of them here
HDRI_Backyard
HDRI_Studio 015
or here: Creo/ARX hdr files
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