After you download and extract the Area Light Map texture, start 3ds Max and drag the ".exr" file into the Material Editor.
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Click Lights on the Create Panel and choose Arnold from drop-down menu then add Arnold Light.
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Select the Arnold Light object and choose "Quad" as shape type. Then on the Color/Intensity section select Texture and drag the output connector of the Area Light texture node to the texture box.
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After you assign the texture your quad light reflection will be updated.
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Go to Arnold menu and select Arnold RenderView and render your scene.
