This is an interesting one because it violates the vague principle of "whatever done by consenting adults in the privacy of their own home is cool".
Like what if someone pastes my face ona naked body, or imagines me naked, or has a dream about me flying through the window naked and writes it in their private dream diary.
I think it's getting into hairy legal territory if the "infringing material" is only seen by the otherwise innocent creator on an airgapped computer.