Cubemap projection onto a sphere

Question

I need to be able to generate texture coordinates on a sphere for cubemaps textures. But somehow I seem to fail in Blender to accomplish this.

See the image below as example cubemap.

I am able to map the texture correctly in Unity by using an cubemap asset, but I am unable to reproduce this behavior in Blender.

$\begingroup$ On a sphere only or for env. texture? $\endgroup$
– lemon
Sep 14, 2020 at 14:07 — lemon, Sep 14, 2020 at 14:07

lemon · Accepted Answer · 2020-09-14 14:28:19Z

5

If on a spherical mesh, you can start with a cube (rotate its UV to fit your map), then add:

Subdivision modifier with "simple" algorithm (we don't want to smooth but just to give more geometry for the cast below)
Cast to sphere modifier

answered Sep 14, 2020 at 14:15

lemon

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$\begingroup$ Thanks for the quick reaction -- could you share that blend file? Because I've been doing all day and somehow it keeps pinching the texture coords. $\endgroup$
– null
Sep 14, 2020 at 14:24
$\begingroup$ here you are... no pinch it seems but uneven resolution at poles. $\endgroup$
– lemon
Sep 14, 2020 at 14:28
1

$\begingroup$ Thanks! The simple division did the trick! This thingy cost me alot of hours :) $\endgroup$
– null
Sep 14, 2020 at 14:32

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