tgm (god mode) won't allow the player to cast spells if the player doesn't have enough mana
In the original Morrowind, having god mode toggled on let you cast spells no matter your magicka level.
In openMW, casting a spell without mana, even with tgm on will show the "not enough magicka" window.
(RM-2331 from redmine: created on 2015-01-31 by Sam K, , closed on 2015-02-01 by scrawl .)
Edited by redmine