GUIDED_noGPS altitude

Hi all,
I am working on non-GPS drone. For this, I’m using GUIDED_noGPS. I have a doubt on it.

  1. Does the GUIDED_noGPS mode have automatic altitude control. That is, will the drone height change if the drone is moving over obstacles on ground ? From what I understand, we do not provide any altitude value like we do for ALT_HOLD, so that means no height control.
    If I give thrust = 0.5, the drone should not change height with or without obstacles, right?

Thank you.

Understood. Thank you @Mustafa_Gokce