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Only the fluid solver is GPU-accelerated, but some processes, e.g. fluid-object collision, are entirely calculated by the CPU. In scenes with many collision objects and other, computationally expensive elements, you might not see a boost in performance by enabling the GPU. These limitations will be removed in future versions of RealFlow where the simulation pipeline will be executed entirely on the GPU.
Typcial cases with limited GPU-capabilities are simulations with the → "Ocean Force", → "Sheeter", and → "Crown" daemons.
My simulation is slower with the GPU enabled. What happens there?
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