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have it zoom in and out once in a while Random intervals

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make it feel like waves of the ocean Color gradients

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have it zoom in and out once in a while Periodic bursts

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Normal Mapping

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have it zoom in and out once in a while Random Intervals

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have it zoom in and out once in a while Acceleration/Deceleration

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have it zoom in and out once in a while Ease-in-out

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