The phrase "art thrifty" generally refers to being economical or resourceful in any creative endeavor, such as painting, sculpting, or even decorating a home. When we talk about antonyms for "art thrifty," we are essentially referring to a lavish, extravagant, or wasteful approach to art. The polar opposite of thriftiness in art would be to splurge excessively on expensive materials, indulge in opulent designs, or neglect the sustainability of the process. Adjectives such as "lavish," "extravagant," "profligate," and "wasteful" would define the spectrum of antonyms for "art thrifty." Ultimately, the choice of approach depends on individual values and motivations, but both approaches can yield remarkable results.