How to make a seamless skyphere texture

[moniker 67]

I have found a texture I like to use as a skypshere, the problem is it cuts in half at some point kinda like this one, notice how the cloud is cut in the lower right.

 

Is there any program that converts an existing texture into skysphere format?

[-StickyMations- 2.6k]

Yeah this is a problem that happens because both the right end and left end of the image you're using is not compatible. I often use a scaled up sphere for a sky texture so I can rotate it and hide this weird looking seam whenever it comes into the view of the camera.

[Frost 3.3k]

Try duplicating the second half in paint.net and inverting it so your image mirrors in the center. This should make it seamless.