During background rendering, a shot on the timeline is rendered by a background rendering network. This is different from the Slave Renderer, which renders shots on a shot-by-shot basis as they are colour graded to enable improved playback performance.
Background rendering in Lustre is performed using Burn for Lustre, also known as the Lustre Background Renderer. This application is specific to Lustre and provides asynchronous background processing of Lustre render jobs. By off-loading rendering activities to remote Linux servers, Lustre stations are freed up for interactive colour grading, while background rendering is sped up by splitting the task amongst multiple hosts.