Ambient Occlusion
Ambient occlusion is the process calculating the distance of the surface from the camera to better define the shadows. As shown below it creates a white effect with darker parts. This is where the shadows are defined. Once combined with the colour render of the sequence it massively increases the quality and appearance of the lighting in the scene. Combining them involves using multiplication blending in photo or video editing software.
The below example from my third short shows an example of what needs to be removed when rendering the ambient occlusion. The most important thing to apply this it to is this models. The process requires removing all lights from the scenes as this can contradict the calculations of the material. It is also necessary to remove any encasing shapes e.g. skydomes or the hangar walls as this can affect the lighting. The example below simply required the two models to be shown but still renders their full animation maintaining the camera angle and movement. If this changed at all the image sequence of the ambient occlusion would be out of sync and creating a complete mess as they would not overlap at all.
The below gifs show the difference between my third shot with and without ambient occulsion.
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