Warning:
The following post is one gigantic minor nitpick.
It's a criticism of the texture resolutions and won't improve any part of the game significantly. I just like to gaze at the planets.

The planetary textures are very nice. They have lots of details.
Like this mountain with its glaciers.

Or like this volcanic planet with it's floating plates.

But those details sadly are very hard to see, because the textures have so low resolution.
Sometimes the textures are very blurry.

It's like they're out of focus.


Because of this, the nice details which are included nearly vanish. Also the cloud textures (which move independently from the rest of the planet, btw. are even lower in resolution and look very fuzzy.
Compare it with the following picture taken from one of the Apollo missions to the moon:

You can see the clouds clearly and their edges are visible.
The seam here is very visible.

The night lights are very diffuse.

Too much bloom here. You can hardly see the textures of the ice planets.

Speaking about seams, this background textures have the same problem as the orange one:

The green and the dark blue background also are very blurry with lots of compression artefacts. They don't come from the conversion to .jpg but are visible in the game also. They also have seam problems.


The north resp. south poles of the stars. (This was what I've meant in my post above. The planet's north/south poles are ok. Sorry for that.)

Normally a sun looks like this:

But after loading a save game they look like this:

It looks like the distortion effect gets out of control:

Happens with every type of sun.

A close up of it.

Speaking of the distortion effect. Imho this effect happens too fast and is on a too large area to look good. It should change slower with smaller areas too. Not so small as in the pictures above, but something in between the current one and the one seen above.
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Btw. it's not that I think the textures look bad, it's just that they're not perfect enough for my taste. I just like watching beautiful high-res planets.