[UPROPERTY](Programming/UnrealArchitecture/Reference/Properties)(EditAnywhere, BlueprintReadWrite, Meta=(UIMin=0, ClampMin=0), AdvancedDisplay,
Category="Movie Pipeline")
int32 EngineWarmUpCount
The number of frames at the start of each shot that the engine will run without rendering. This allows pre-warming systems (such as particle systems, or level loading) which need time to run before you want to start capturing frames. This ticks the game thread but does not submit anything to the GPU to be rendered.
This is more cheaper than RenderWarmUpCount and is the preferred way to have time pass at the start of a shot.