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3DS Max: Mental Ray - Environment Map Scaling Issues

I'm using a spherical HDRI image as the background to my scene.

It works fine, either I put the HDRI directly in the Rendering > Environment > Environment Map, or I can put the HDRI into the MR Physical Sky and put the MR Physical Sky into the Rendering > Environment > Environment Map slot.

I can rotate the map, using the UV offset values in the Material Editor. I can also preview the HDRI in the viewport.

The problem is that the scale of the background map is far too large. I've scoured the web for information, but nothing. :poly142: How can I modify the scale that the map is displayed at, to match my scene?

Thanks! David

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