Lines on "net" like surfaces

[Ezekiel20]

Hello there, first of I tried to find anything about this, but thats where my problem starts, as I dont know if this "phenomenom" has a set name.

 

While playing for a while now, I suddenly noticed those "lines" appearing on some clothes (in fact kinda every surface that is kinda "net" like) yet I remember that this wasnt always the case.

Here is a bodyslide screen to show what i mean:

 

 

 

 

Now this Piece of clothes (yes its a mod) shows what I'm talking about, what confuses me is that when I downloaded and installed it, the "shadowly lines" as seen in the screen werent around...or at least thats what i firmly believe to be.

Also the "lines" are "moving" upon moving the camera, zooming in and out or the character moving. Its gone with the camera zoomed in (like up to a feet away seeing the textures up close).

 

So, questions are:

 

- Has this effect an actual name (like we call things that "clip" trough, "clipping").

-Is it something "normal" as that its not a bug, and anyone else has it (and I just remember it wrongly).

-If the above is false, what causes it.

 

Also, another piece of armor this happens is the "Sirius Armor" (the "under amor"/bodysuit parts).

Now I'm not a total computer and graphics professional, so I'm kinda sorry in advance if this is something well known and I'm just to dumb to find out myself.

 

p.s. As I changed to another piece of clothes/armor (without this problem) it's not really that importand to solve, just a question that kept bothering me.