Avoid modern or contemporary elements that may disrupt the retro atmosphere and the symmetry of the composition. Exclude advanced or futuristic technology objects. Ensure that the high-wing Piper J3 Cub remains the central highlight and that symmetry is maintained throughout the image, conveying a sense of nostalgia and visual balance. Make sure that the construction of the Piper J3 Cub adheres to its original design, without any abnormalities that may alter its character.