Lat / long UVs on sphere? SOLVED

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Hi!

I wanted to map an hdr on the points of a sphere so it's mapped the same way as arnold's skydome Lat / Long setting. I'm doing a cylindrical mapping of my sphere and the sun looks streched out and at the wrong place compared to how arnold does it.

Any tips?

-Olivier
Edited by olivierth - Feb. 9, 2021 10:43:32

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Houdini_latlongMapping.JPG (159.5 KB)

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UV texture -> Polar
https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]
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I already tried it and it's not the same. You can see that from the same camera, in the arnold render, the sun is close to the top of the framing, but in the viewport with the polar mapping of the same hdr image, there's a bigger gap at the top of the framing.
Edited by olivierth - Feb. 5, 2021 14:17:29

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Houdini_latlongMapping_02.JPG (95.3 KB)

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The sphere isn't infinitely large
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DOH! That makes so much sens!

I'll scale it up. Thanks!

-Olivier
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