When using Movie Render Queue for path tracking rendering, I found that with Reference Motion Blur enabled, the rendering speed would be much faster than without it, at least twice as fast.
I found that when Reference Motion Blur is enabled for rendering, the GPU runs at almost 100% speed, while when not enabled, it only runs at 20% -40% speed.
In terms of speed, enabling Reference Motion Blur is the optimal solution, but its output is sometimes not as good as not being enabled.
I would like to know if there is a way to disable Reference Motion Blur without enabling it.