If you want to use it as an IBL, then you have to load this HDRI in the GI (Skylight). If you want to use the HDRI as background, all you have to do is to load it in the Environment rollout/Background. In Vray SketchUp you can actually use the HDRI both as a background and an IBL (Image Based Lighting). You might want to see my separate Vray glass tutorial here: Since I already rendered the scene before writing this tutorial, the vray glass materials were already added. Let me begin this tutorial by using this simple SketchUp setup composing of different types of glass urns using the follow me tool.
I love DOSCH HDRI, but if you want some free excellent HDRI, you can visit my favorite site. For this tutorial, I will not talk about how to create them but rather how to use them in VraySketchUp. You can use Photoshop or Photomatix to create HDRI. It is a technique that allows a larger span or range of luminance between the light and dark areas of an image. Nomeradona’s Tutorial : Using HDRI in Vray SketchUp HDRI stands for High Dynamic Range Imaging.
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