On the first call to renderOutput:... my plugin loads an external image file to use as part of its effect. Since render performance would outright suck if I loaded the image and then tossedit after rendering each frame, I keep the image in memory and dispose of it in the plugin's dealloc method. While doing some testing I noticed that instances of my plugin get created as it is associated with a clip but don't get deallocated until either the project containing the clip is closed or FCP quits. This suggests that if there are enough clips using my plugin, for example, then application memory could get tight. Based on my understanding of the FxPlug API, there doesn't appear to be a way to determine that rendering is really done, or at least the plugin won't be needed "soon." Does this mean I have to hope that a user doesn't overload FCP's memory and cause a crash?