So my Beguiler player is asking if he can make an invisible illusion, using only one of the image spells.*
Can the spells do this? I'm guessing not. It makes an image. It's there, period. Everyone with eyes can see it. Otherwise you make an image of ... nothing. And no one sees anything, even with see invisibility. Am I right in my assessment of the situation?
*I realize that if he had the Invisible Spell feat, then he could make a silent image of a creature, that would only be viewable via see invisibility. The character does not have that feat.