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Properly mapping a sphere in Houdini without stretching

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leoberti
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Hi guys,
Noob question here:

I am trying to map a sphere in Houdini with an spherical HDRI texture. Is there a way that I can get rid of the stretching at poles?



In blender everything looks nice and easy with the same texture applied on a sphere:




Thank you.

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HoudiniStretching.jpg (337.9 KB)
Blender_nice_mapping.jpg (163.7 KB)

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raincole
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If you use cylindrical projection it'll be stretched. The correct way to UV unwarp a sphere for an equirectangular texture is like this:

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Screenshot 2025-03-07 014743.jpg (256.9 KB)

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leoberti
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raincole
If you use cylindrical projection it'll be stretched. The correct way to UV unwarp a sphere for an equirectangular texture is like this:

Image Not Found
Thank you for reply.

I already tried this method with UV projection. on my side still looks stretched:

Attachments:
houdini_strecthed_2.jpg (197.1 KB)

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Mike_A
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What's does the wireframe look like in the Blender version?
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leoberti
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Mike_A
What's does the wireframe look like in the Blender version?

It was the exact same sphere in blender.

After some testing it appears to be a viewport display problem. If I render the sphere, everything looks as it should.
Maybe its a bug or something with this version of Houdini. 20.5.445

Thank you guys.
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toonafish
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Don’t rely on the Houdini viewport, compared to other 3d apps it’s buggy and outdated to put it mildly.
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raincole
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Yeah, I honestly have never seen a 3D package whose viewport is as unreliable as Houdini's (while people are making Oscar-winning film with Blender EEVEE...)
Edited by raincole - March 14, 2025 02:47:53
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