Vray Tutorial
In this module, we demonstrate how you can control where the Bloom and/or Glare effect is applied using a selection mask based on the Intensity of the pixels in the rendered image. The Intensity masks work straight forward. The V-Ray Frame Buffer holds the image in a 32 bit floating point format. Using the intensity mask V-Ray applies the Bloom and/or Glare effect only on pixels with Intensity higher than the one specified in the Intensity parameter. This allows you to avoid "blurring" the entire image and have the Bloom/Glare effects applied only on the bright areas of the image.