Read up on g buffer and deferred rendering. Usually one doesnt do everything at full resolution until the final output and even then it is often better these da

Read up on g buffer and deferred rendering. Usually one doesnt do everything at full resolution until the final output and even then it is often better these days to have fancy upscaling. Many games do let users set the things you mention but it is not always so simple. For example, handling rounded edges and notches is a huge pain.