Using Dome light setting, the lights come from HDRI map as direct light, and all kinds of effects like shadows, reflection, etc… will be apparent. This can be illustrated in test render sample (see image 2.0/ Setting 2.1.B and Setting 2.2.B). The shadow in Dome light+ HDRI setting appears to be smoother than Vray sun setting. Follow the parameters set-up I made for this test render experiment (See image 2.1 Dome light Setting). To change the parameters for Dome light follow the procedures: under ‘Vray Asset Editor’> go to ‘Lights’> click the Vray Dome light> under Light dome, you can see two main parameters (Main and Options). In order to set-up the Dome light: click the Dome light icon and place it in your SketchUp scene. Thus, optimizing the Dome light settings is important in order to produce a suitable environment in relation to HDRI map. Reset to default will reset the preset back. Rename will also warn you if the name you want to use already exists. If you Duplicate a Setting, you will be prompted to rename it, or accept the default name which appends the copied Settings Preset name with the word ‘Copy’. Using Vray for SketchUp, when loading a Dome light+ HDRI in default setting, the render result will be darker in nature (See image 2.0/ Setting 2.1.A). You can Rename, Duplicate, or Delete a Settings Presets, as well as Reset to default, via the Presets Menu options.

Reset vray settings rhino 3.4