During the Renaissance, a particular type of painting was popular. It involved painting directly onto plaster which was wet. What was this called?

The art of painting covers a broad spectrum of materials - from watercolors to oils, acrylics to tempera - and also techniques. The wide variety of painting materials can be used in an almost limitless number of processes, and on many different surfaces, to produce vibrant, stunning and unusual results. A knowledge of the countless different combinations of materials and ways of using them will increase the choice available to you and improve your creative skills.