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imagery with Gimp using: Filters / Distorts

After reading the discovery of extrasolar planet "Gliese 581 g", which apparently could be habitable, I remembered a tutorial I read about how to make an imaginary planet with gimp .

The report they tutorial is here.

was so determined to make one from the following picture:

In my work I applied some variants of the advice in the tutorial above.
The road was as follows:

1 - Locate the picture.

I present some of the tips read:

- The image must be a clear marking of the horizon, where note the difference in land or sea, sky.

- In the space of the horizon, we must try to see buildings, or objects that scroll across the horizon.

- At the top is good to have few details. It is important to ensure that details are concentrated mainly in the central part of the image.
- Another point to consider is that the corners of the image coincide with each other.

- It is important that both ends of the image does not have much difference in tone.

2-Resize and rotate the image.

Resize: Image / Scale Image

I changed the parameters of height and width, to make it a perfect square. I activated the cubic interpolation. The image was distorted.

Then rotate 180 º: Image / Transform / Rotate 180 degrees.

3-Apply the filter

I applied a distortion polar coordinate type: Filters / Distorts / Coord. polar.

4-I added, with the fill tool, a background the same color as the sky.

5-copied and pasted into another layer the upper half of the image. Rote and I placed at the bottom.

6 - Then copy , with the free selection tool, the buildings of the image. The hit and rotate in two different layers, located on both sides (right and left).

                                                       
This was made the imaginary world that can be seen at the beginning of this post.

What is relevant for this task is being able to exercise "filters distortions."

I leave this picture that I gave the name "my little island", the other picture I could work similarly.

You can see that ... with Gimp, dreaming does not cost much ... Until next

learning.