"Warped" lighting on a sphere

Unity Engine
1

Hi,

I have a strange lighting-effect on my sphere in a scene. The scene is very simple: One sphere and one directional light. With that setting the light warps around the poles, which looks weired. In the image you see the sphere from top and a duplicate from bottom. The light comes directly from the bottom edge of the window. And the lighting seems to twirl around the pole.

The sphere has been imported from blender with UV maps in cylindrical projection, but the built-in sphere is the same. I found, that the lighting is correct without UV-mapping, but than, of course, the texture is not placed correctly.

Regards

20875-lighting.jpg
20875-lighting.jpg1604×648 95.1 KB

2

Seems like I have come closer to the problem:
I am using the Strumpy Shader editor. and each time, I use a normalmap, the lighting warps around the poles.
Does anyone have an idea?

3

Okay,
finally I got it.
The strumpy has a function called “unpack normals”, which has to be in the pipeline for the normals.
Now it works as expected.
Thanks for reading