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Yes , it does not have to be hand drawn, It can be any art.

Thanks for the conformaroon.
Btw my upvote of you comment does not got to dust vote category, correct ?
I remember you taught me about the voting power scale drop by 2% of every upvote I do. I could see the voting percentage in steemworld.org
Cheers

I have dustsweeper now too, if it does drop I am covered, Check out @dustsweeper

I heard about dustweeper. And I will explore it

Looks like jan already answered you but to echo what he said, you can do any kind of art as long as it fits the theme of the particular challenge!