how to motion blur maya fluids

[excentriPMNA2]

i read the arnold manual.

there, the following steps explained

1. cache the fluids.

2. check the Enable Deformation blur in fluidsShape node.

3. In the Render Settings, check Deformation in Motion Blur.

4. Use the Fluid's 'Velocity Scale' (in Contents Details) to control the amount of motion blur on the fluid.

but, I followed the steps, any change didn't happen.

how to motion blur maya fluids?

[Anonymous]

Make sure to cache the fluids with Velocity, because motion blur need velocity.