replace only the ceiling paint color using the reference image as the color guide paint the existing shiplap ceiling in the referenced green while preserving the shiplap profile grooves spacing texture wood detail and direction exactly as they are do not smooth plaster over or replace the shiplap the ceiling should remain clearly identifiable as painted shiplap with visible joints and subtle texture match the green color and finish from the reference image while maintaining the room s existing lighting and shadows do not alter the architecture millwork furniture d cor walls trim or any other finishes the existing shiplap is a fixed architectural feature and must remain fully visible after painting only the paint color should change do not modify the ceiling material or geometry