Layer Height Issues

[MrColz101 0]

Hello! This is still a relatively new problem for, and started happening when I played around with a couple settings to improve print quality. Here's the overall problem:

 

Small holes that look roughly like a square appear in patterns on flat surfaces.

Pretty sure this is a layer height issue, but I don't know the correct height... any help would be appreciated. Thank You.

 

[Curven 28]

The image isn't sharp so it is not easy to see what you mean...

Should the top surface be full? Then chek the numbers of top/bottom layers you have, I think default is 7 (not sure) and minimum should be 5 to have a nice finish