To have motion blur on points or strands, SItoA uses the following attributes:

 

 

For cases where sub-frame motion blur is needed, you must enable Exact ICE Blur in the rendering options.If enabled, SItoA does not require the velocity attributes to be defined for points and strands. Instead, the point cloud geometry is evaluated at all the motion blur times, so giving much better results. But there is a price to pay since it requires evaluating the geometry several times, which can be quite expensive. And, there are two limitations:

These are the steps to follow to correctly cache a simulation on disk and read it back:

 

See the rendering options for details on tuning the motion blur settings.