I have this issue now, see when I zoom skin looking good and when I zoom out it come to its original skin as you can see in SS.https://imgur.com/a/u0HKJM9
I can't see any wrong in the SS.If you are meaning the quality of the skin changing when you zoom out the screen, So that's because you are in GTA San Andreas man! It's normal. Explain more if I got you wrongly.
You can,see clearly in SS man
That's your problem ? that's normal dude. When Hosting a Game or Logging into map editor to test your skin/shader it appears with a slightly lower quality since the "Host Game" and "Map Editor" has nothing that makes the game clear and HD. Luckily, in CIT it's perfect and HD so it may appear slightly less HD than CIT for obvious reasons. Thus, That's perfectly normal and I had the same problem but when the skins/shaders got added in-game and I saw them, they were perfectly texturized and HD.