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- "Number of Threads" specifies the number of processors/cores for the simulation. With "Auto" RealFlow | Cinema 4D will always use the maximum. You
- You will hardly see any boost in simulation time with more than 32 threads.
- "Use Geometry Velocity" is only relevant if your project contains animated objects.
- "Use GPU" activates the simulation via your graphic card. We recommend reading the → linked page for more information about what's important.