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There is also a single-threaded process: Python. Whenever you run a script inside RealFlow, only one CPU or core is used. That is a principle matter of the Python programming language, not RealFlow, because Python can only support one CPU. Plug-insPlugins, written in C++ can handle multiple processors.
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This section is of particular importance, because it is responsible for the number of substeps for Hybrido, HySPH secondary elements, particle fluids and body dynamics and describes a simulation’s accuracy. The more substeps, the better the result. The settings of the “Stepping” section control the number of substeps, RealFlow will finally use for a simulation – like a higher-ranking control instance. An example will help you to understand its functionality and mode of operation. Let’s say you have entered the following values under Hybrido > Hybrido Main Solver > Stepping: “MIN substeps” and “MAX substeps” are 1 and 53.
Under General > Stepping you have entered 1 for both parameters to create a fixed substep. In such a case, Hybrido will perform the simulation and needs (for example) 3 steps for the current frame, but the “Stepping” section under “General” says that the maximum is limited to 1 step. The final consequence is that Hybrido will use only 1 step instead of 3.
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