Workflow for rain ripples:
– create rain with nParticles,
– render nParticles from top but using camera clip plane only to isolate particles around grid area
– use this render image seq as influencer on waveSolver
– Render all togethe

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Workflow for rain ripples:
– create rain with nParticles,
– render nParticles from top but using camera clip plane only to isolate particles around grid area
– use this render image seq as influencer on waveSolver
– Render all togethe