They do use the same textures. Those were all taken from the original mods and unless Wrinklyninja did some tweaking, they haven't changed.
What has changed though is the HDR strength. Without having done that, everything had that nasty nuclear bright glow. It was rather bad before we figured out what to change to bring it down to acceptable levels.
The script has really very little to do with all this other than to pick one when the time is right. Each weather still has its individual characteristics. So we really would need to know specifically which one is at issue here. Simply telling us they're all borked isn't going to cut it because that's simply not true.
Well I haven't finish my last post, when editing to add some examples (though I don't demand them to be adjusted) I saw your post.
Here are some examples about some issues. (I didn't active HDR and only use a normal 17 inch LCD). Some examples I have mentioned before and I hope you both have fully read my posts.
AWS type, sunny or cloudless day, strongly red light while sunset, the red light make my eyes ached. (And I haven't active AWS again since this first try.)
NW type, sunny day, no blur around sun and little blurred mist near horizon, making the sky have no colour trasition form sun to horizon, all is pure blue.
NW type, cloudless day, with little misty thin cloud in blue sky, so the cloud looks like thin smoke with a little purple colour (perhaps due to grey cloud adding blue sky), sunshine in this weather is still bright, but this weather belongs to cloudy, so street lamps is still lighting in day.
Some heavy fog weather (I'm not sure which type, maybe NW or AWS), some small objects such as iron bars close to player charactor become nearly white , while bigger objects such as hills, towers and city walls far away remain as white or black outline.
EW type, (heavy) fog day (including fog storm day), hills remain pure white outline in the white fog, and especial when storm with fog, sky remains a overcast sky with no white fog (this feature may be real, but compared to bright sky, fog is too heavy for rainy day). This feature is similar to vanilla weather, so I don't know whether it is due to EW, but at least it is not a drawback of vanilla.
Well, I only remember these. Some other effects about shower, rain and storm are not remembered clearly now.
So I think AN is not really perfect in visual details , the more weather feature added, the more problems it will come. And a complex weather without well adjusting will not as good as vanilla weather.
ps. when I was trying original NW I found a heavy fog day with no outline left in the white fog. I'm not sure I have seen same sub-type in NW of AN, but at least I remember one heavy fog weather in NW of AN leaves objects far away black outline, and I have never seen a fog of AN make things far away disapear into white fog. If there isn't any other heavy fog, the two will be a same weather, then I wonder using same texure why they are not the same.