Unreal engine spheres impossible to texture (pole pinching)

Hi, so I’ve been looking everywhere for an answer to this problem but I simply can’t find it, so I’m asking a question here.

I’m trying to texture a sphere using a mercator projection of the earth to make a planet, and everything looks fine except for the poles. These types of spheres have geometry similar to the latitude and longitude lines on earth, but they merge at the top into triangles, which creates bad UVs. For anyone who wants to see what the UVs of these objects are, here.

As you can see, there are spots at the top where the texture is simply not included in the UV, so this probably creates texture problems. How do you actually texture an object like this? Is there a method entirely in unreal engine, without using external software? Surely there must be a simple solution to this, given this is a default object in virtually every 3D software.

There is no solution. It’s a well known problem :slight_smile:

You either have this

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or box projection

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or world aligned material that fades between planes

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If you’re going to have snow at the poles, then actually the first is probably the best.

Try some of the textures on

it will map to the default UV, but has the poles fuzzed out

image

Thanks. Do you know what exactly the cause of the pinching is?

Yes, it’s these points gathered together

image