Requires Unity 4.3.0 or higher.
** Requires Unity Pro **
SSAO Pro offers a high-quality, stable and halo-free version of SSAO for Unity with added features like lighting contribution, distance cutoff with smooth falloff and occlusion color.
SSAO (short for Screen-space ambient occlusion) approximates ambient occlusion in realtime. It relies on the depth and normals buffers to darkens creases, holes and surfaces that are close to each other. In real life, such areas tend to block out or occlude ambient light, hence they appear darker.
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