I used this render to test the new denoise function in blender - I rendered the animation with 24 samples.
you can download the blend file here - to run it you have to use a blender 2.79 build, the denoiser is not available in 2.78.
microdisplacement denoise test
denoising blender animations with opencv and python
Processing and Blender Sound Visualizer for Magical Dreams
blender dynamicpaint displacement