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Visible Environment

You can make Environment maps an environment for lighting and an environment for the background. Apart from having an HDR image to light the Environment, you can specify a different Environment for the background and also see that background in reflections.

Figure 1: An Image texture is visible in the reflections while a Daylight environment illuminates the scene

The Visible environment incorporates reflections and refractions from a second HDRIAn image which presents more than 8 bit per color channel unlike most common image formats. or image. You may also want this second HDRI to serve as a backplate, and this backplate can be visible or invisible.

The Visible environment node has options for controlling the Environment's behavior when it's the visible Environment. When you use the Node as a normal Texture environment from the Octane Environment dropdown, these options are ignored:

• Visable Env Backplate - Uses the Visible environment as a backplate image.
• Visable Env Reflections - The Visible environment overrides the Normal environment when calculating reflections for SpecularAmount of specular reflection, or the mirror-like reflection of light photons at the same angle. Used for transparent materials such as glass and water. and GlossyThe measure of how well light is reflected from a surface in the specular direction, the amount and way in which the light is spread around the specular direction, and the change in specular reflection as the specular angle changes. Used for shiny materials such as plastics or metals. materials.
• Visable Env Refractions - The Visible environment overrides the Normal environment when calculating refractions for Specular materials.

Figure 2: A Texture environment visible in the backplate and reflections

Figure 3: A Texture environment visible in the reflections only

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