A must for art lovers, four-dimensional paintings have recently emerged as a popular decor trend. This framed 4D wall painting (41x31, 15x2 cm) has a floral image to create a touch of spring-summer to your interiors. a 1. 4-Dimensional paintings are very popular decor trend this year. A special 4D technique uses stereoscopic effect to add depth, making the beautiful art piece catch immediate attention.