Here are some extracts from Padmavajra's classic talk series from 2004 on the Diamond Sutra in which he looks at the Buddhist Mahayana tradition of the creation of Buddhafields as part of the Bodhisattva's activity.
These are taken from talks 3 and 8. Listen to the whole series
Listen to a wide variety of speakers and approaches to the traditional idea of 'the Buddhafield', and to the contemporary Triratna Buddhafield project itself.