One method which changed the way Renaissanec artists approached painting was

Humanism

Explanation:

Renaissance arts flourished between the late 14th century to early 16th century. During this period, Renaissance arts metamorphosed between the Early and High Renaissance period. However, one method which changed the way Renaissance artists approached painting was "Humanism."

This method of art technique made arts and paintings of this period rather than appear abstract in form, it concentrated on human needs, abilities, and area of interests.

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