Are you sure your using the right word? "Vain"
1. excessively proud of or concerned about one's own appearance, qualities, achievements, etc.; conceited: a vain dandy.
2. proceeding from or showing personal vanity: vain remarks.
3. ineffectual or unsuccessful; futile: a vain effort.
4. without real significance, value, or importance; baseless or worthless: vain pageantry; vain display.
5. Archaic . senseless or foolish.
—Idiom
6. in vain,
a. without effect or avail; to no purpose: to apologize in vain.
b. in an improper or irreverent manner:
If one see's God as say, pure energy or light.. full consciousness, etc. Then I think saying "would you worship a god that wants you to be his image" would translate to "would you worship a god that wants you to achieve absolute awareness, consciousness, intelligence," etc. So yes, i could worship a God like this.
If your asking If I could worship a God in a white tunic and sandals, then no. =)