(experiments in fluid dynamics)
initial simulation (filling the pools)
After modeling some pools, the next step was to fill them with a torrent of particles. Once the pools were full, I turned the water pressure down to a trickle. Total simulation time (filling + adjustments) amounted to maybe 2000 frames, or around a minute of animation. Only 120 (4 seconds) of those frames were used for the final video.
I only concerned myself with two passes this time around: motion vector and specular. The motion vector pass is represented above. Each additive color - red, green, and blue - corresponds to a different spacial dimension - respectively, the X, Y, & Z vectors. The compositing software uses those first two colors - red and green - to blur pixels along the width and height of an image.
specular pass with highlight filter
The specular pass is used to create a sparkly effect on the water.
This video shows some of the steps of the process.