Does anyone have any idea why a repeater would just stop rendering? I checked the obvious. Keyframes or expression on opacity . Layer not extending to the edge of the comp. I am at a complete loss. I thought it may be the number of copies but that doesn't seem to have any affect it just seems to stop rendering at some point around the 5 second mark. I used a repeater to create a 3D tunnel that reacts to the orientation and position of the center object.