I like drawing paper bags, so I started a sketch of one. While sketching the phrase “letting the cat out of the bag” occurred, and I like drawing cats, so I put one on top of the bag. Bag and cat seemed to need a context. “Void” filled that void.

But this seems to be only a step. I know if I threw a few hours of hard observational work and trial&error at this concept it would yield a more satisfying, interesting result. But I am as always in a hurry, and so this is set aside for now.