The sudden appearance of something unexpected in communal space can be lethal. One of the problems congregations routinely encounter when acquiring visuals for worship involves the size of the new work in relationship to the whole space. Consider the relationship carefully. Too often, visual noise is introduced in place of visual enhancement. This concept is more easily acknowledged when you consider the current trend of placing multiple, small, seasonally significant objects around the base of the table.
Congregations also encounter problems when they add paraments to chancel furniture.
They do not consider the architecture of the chancel furniture in relationship to the shapes and sizes of the paraments. Catalog paraments rarely suffice because they are unrelated to the table's size, the pulpit's planes in relief, and so on. When a right relationship is achieved, then visual harmony results. Quality art created by competent artists helps worship celebrants achieve transcendence. Thus, it is in the best interests of the congregation to seek and employ an artist and value his or her expertise.