He used symbols and figures from pre-Christian beliefs to convey neo-Platonist ideas. Take one of his paintings for example, the Primavera which translates as spring. This painting includes nine figures from Classical mythology. On the center is Venus coupled with Cupid. On their right are Zephyr, Chloris and Flora and on the left are Mercury and the three graces. The figures on the right represent the coming of spring, nature and its beauty. In contrast to that are the figures on the left which represent reason and the pleasures of human life. These are two different points which harmonizes on the center figure.
Being a prime mover of neo-Platonism in art, Botticelli's techniques are yet to be developed. The symbols he portrayed are literal and, for the educated and elite, too obvious. But even at this point he has already defined the essentials for neo-Platonism, the fusion nature and grace.
Leonardo is known on our time as an inventor and a scientist, and these qualities can be seen through his art. He was a master of proportions, shading, depth and ways of making his work look "real". Even outside of the standard of beauty as long as his work looks alive, for him, achieves the harmony of neo-Platonism.
Raphael took it further by involving and evoking emotions through his paintings. He was also interested with philosophy which shows that he is an artist as a scholar. ...