Depending on the context and the distance, it would be even more realistic if the two parts of the pillars dont match absolutely exactly, some missing pieces in one or both halves are to be expected. Easy enough to extend the suggested procedure to subtract another small terrain or two from the half pillars.

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
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