> he painted on dry plaster because he took way too long on it that is not true: he new that he was not able to paint a normal fresco, so he tried a different

> he painted on dry plaster because he took way too long on it that is not true: he new that he was not able to paint a normal fresco, so he tried a different technique, that didn't work out. https://en.wikipedia.org/wiki/The_Last_Supper_(Leonardo)#Medium https://en.wikipedia.org/wiki/The_Last_Supper_(Leonardo)#Med...