One of the features in RealFlow5 is the capability of extracting a version of the fluids in low quality or better said lesser number of particles. Apparently this could seem something contradictory if we are talking about simulations, but actually the most important reason is the possibility of visualizing and check quickly the results obtained from our simulations. Still more when these contain millions of particles. I would like to make it clear that there is only one way in RealFlow to calculate the proxy version and the way is by activating it in the Export Central panel. Each Emitter or Grid Domain has a check box to extract the proxy version and is highly recommended activate it always you are going to work with millions of particles or cells in case of using Grid Domains.
There is the possibility of visualizing the proxy version during the simulation in the GUI, you can access by selecting one of the options from the button (eye),but in any case this button actives the options in the Export Central.
The following video shows the full simulation with all thes particles contributing to the simulation (6.000.000 Cells, aproximatelly 6.000.000 of particles). This video is visually much more spectacular but to create it I needed 1 hour approximately.
In these previews I activated the GD, Splash and Foam proxies. Actually, between them there is no big differences in times, but they do not exceed of 4 minutes. This is the main reason to use proxies in complex simulations. Some of the following simulations are not so spectacular as the first one, but it is enough to have an idea of the final result.