Texture cropped/cut in custom SkySphere

Hi! I have experimented and changed around some in the panning_clouds part of the default SkySphere, I have exchanged two of the textures to tetxures of my own, which looks pretty good/nice. The only prtoblem I have is that the textures are cut off/cropped in one place making it look like a straight line. It looks really awful and I dont know how to solve it. I am very inexperienced with skyspheres and HDRI in ue4.

Here are some pictures of my problem:

Imgur

Imgur

Thanks in advance!

I’m not able to help, but I’m excited about what you’ve done so far! Can you tell me how you did it, or what tutorial, if any, you followed?