Why does motion blur affect rendering speed so much?
In some cases, it can lead to hundreds of times of rendering time, even if there is no high time sampling
When I turn motion blur off, I only need 2-3 minutes to finish my rendering
When I turn on motion blur, I choose the vertex speed mode in the tag
The shutter in the camera tag is adjusted to 0.005 sec. It takes me 84 minutes to finish rendering, and I often can't update the scene
And why it seems that using motion vector AOV doesn't help optimize rendering time. I used vertex speed mode and picked up the correct vertex map
thank you