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I want to create 2 images with mirrored lighting. The direction of the shadows is not particularly important. It is only important that the second image casts a shadow that goes exactly into the opposite direction. I use an HDRI without additional light sources for the lighting. The light source appears to be in the upper right corner as the shadow points to the lower left.

HDRI lighting from top right

Whatever I try to change the direction of the shadows changes the color significantly. Is it possible to mirror the HDRI horizontally without affecting the color?

The example file can be downloaded here: https://www.dropbox.com/t/YtmJLA9vNr0zcF5Q

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2 Answers 2

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Found this video that might help: https://www.blendernation.com/2017/08/30/control-hdr-shadows-blender/

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HDRI coordinates can be adjusted using the Mapping node. First, it is recommended to enable the Node Wrangler addon. While the HDRI node is selected, press Ctrl+T to add Texture Coordinate and Mapping node. In Mapping try scaling by $-1$ in X or Y for a mirror effect.

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