Just made a chanter. Illusion and faction question.

[curtischoy]

Hello all, I just made a high elf agnostic ench and am lvl 13 atm. I was wondering a few things about illusions.

I know that say if I put on a DE illusion I should be able to walk into Neriak and buy/sell and turn in quest stuff, if I felt so inclined.

My questions is, lets say I ruin my faction in FP by killing guards or something. Can I then throw on human illusion and be ok?

Not exactly sure how the illusion and faction stuff works.

Thanks for any advice!