This is the place where the simulation preferences are defined. The "Solver" tab is subdivided into four sections.
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Global
Number of Threads
Here you specify how many computer processors and cores you want to use with your simulations.
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RealFlow | Cinema 4D calculates how fast the fluid will move within a simulation step (aka "time step" or "substep" – see "Liquid - PBD Solver" and "Liquid - SPH Solver" below):
- With a value of 1.0, the fluid will not move more than 1 grid cell in the current simulation step.
- With values smaller than 1.0, the fluid can cover a longer distance within a single step – the solver is less strict.
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The parameters of this section are only required when the → fluid container's "Type" is set to "Liquid - PBD".
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The parameters of this section are only required when the → fluid → fluid container's "Type" is set to "Liquid - SPH".
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This option is only available if your graphic card supports OpenCL-CPU calculations. With very fast multi-core CPUs, the GPU's impact on the simulation is often negligible.
Device
Choose, which GPU you want to use. Please note that only one GPU can be used for simulations. Simulations with multiple → fluid containers do not benefit from GPU support at the moment. In this case it is better to disable "Use OpenCL-GPU".
Use CUDA-GPU
This option is only available if your graphic card supports OpenCL-CPU calculations. With very fast multi-core CPUs, the GPU's impact on the simulation is often negligible.
Device
Choose, which GPU you want to use. Please note that only one GPU can be used for simulations. Simulations with multiple → fluid containers do not benefit from GPU support at the moment. In this case it is better to disable "Use CUDA-GPU".