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V-Ray Bump Normals is a render element that stores the camera view as a normal map. The normals are generated using screen space (the Screen coordinate system in Maya) which uses the XYZ orientation of the camera view. With Screen space, the X axis runs left-right across the view, Y runs up-down, and Z points out of the screen. Bump maps are also represented in this render element. For a diagram that illustrates how normal-style colors are generated, see the Normals (vrayRE_Normals) page.

This render element is similar to the Normals (vrayRE_Normals) Render Element that does not include bump maps.  

The Bump Normal Render Element is useful for adjusting lighting that comes from a particular direction. For example, faces of objects pointing toward the camera will be predominantly blue in vrayRE_BumpNormals, so the lighting on such objects can be adjusted by using the blue channel in compositing software.

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titleUI Path: ||Display Render Settings button|| > Render Elements tab > BumpNormals
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||Render Settings window|| > Render Elements tab > BumpNormals

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To use render elements, select from the Available render elements column and click the Add button to add the passes you wish to generate at render time. When you render the scene, the added render elements listed in the column on the right, will also render, which can be viewed from the VFB window's channel drop-down menu.

For more information on the parameters on this dialog, see the Render Elements tab page.

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The parameters for this render element appear in the Attribute Editor under Extra V-Ray Attributes.

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Enabled – When checked, the render element appears in the V-Ray Virtual Frame Buffer.

Deep output – Specifies whether to include this render element in deep images.

Filename suffix – The text added to the end of the rendered file, when saved as a separate file (e.g. myrender.bumpnormals.vrimg).

Filtering – Applies the image filter to this channel. Image filter settings are in the Image Sampler rollout in the VRay tab of the Render Settings.

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Common Uses - Relighting

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