V-Ray for Rhino Manual - Rum

Bitmap Environment light source
If user does not have HDR image, a regular Bitmap can be also used as Environment light source.
Although a normal Bitmap doesn't have the same ability to create as dynamic an environment,
normal images are very easy to get. As long as you pick the right Bitmap and control the Intensity
well, it can still be a very good Environment light source.
The three images on the right are rendered with different Bitmap. Compare to those rendered with
HDR images, it is not as easy to determine the direction of the light and the shadows are not very
clear.
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