How do I prevent pixelation on my textures?

Hi,

to prevent pixalation: try creating your texture in a higher resolution e.g. 4096x8192, then scale it down to 2048x4096 (for HD mod compatibility) and import it in sims4studio.

distortion: I think you exportet the original texture and drew your own over it - right?
The exportet texture is just an 2D image applied to an 3D Objekt. Therefore your 2D image will be "stretched and distorted to fit". Look at this picture:

This is the upper body UV map in blender. See those lines and how they are spaced - thats because there is a hight difference on the actual 3D object. If you draw a line left to right under the collarbone you'll get a more or less straight line. If you do this over the breasts you'll get an distorted line.

I haven't created any clothes yet - only Tatoos but the principle is the same. To prevent distortion you can either draw your own texture with these distortion lines in mind or you can edit the texture directly on the 3D model in blender. There may be other/better ways to do this but they are unkonwn to me - yet...

coolerboost
Hi. Unless you have hq mod, both s4s and the game will scale your texture down to the default size, so doing it is pointless.
If you will use 4096x8192 specifically, your content wont work with hq mod