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Render On Each Sim Frame | rend_sim_frame – During simulation, after each new frame is simulated, this option will start a render with your currently assigned production renderer and with the render settings you have dialed in your Render Setup 3ds Max dialog. You can use this when you leave a long simulation overnight, so you will have a ready rendered sequence when you come back to check on it, even if the entire simulation did not have time to finish. If you are doing test iterations and you don't need your fire/smoke to be rendered with production quality, you could enable the GPU Preview extended viewport and use the Save Images During Sim option instead.

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When doing test iterations on your simulation setup, you can also speed up the simulation by

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enabling Cacheless Simulation

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 from the Output rollout.

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An alternative approach to Render On Each Sim Frame is to automatically start a sequence render after the entire simulation has finished by adding

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'max quick render'

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 command under the OnSimulationEnd()

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 callback of

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the Use Script

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 option below.


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UseScript
Use Script | script, use_script – Enables the use of a MAXScript during the simulation. Press Edit... to open a window with sample code and a short description of available commands. For more information, please see the Phoenix MaxScript documentation.

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