Hello, I made a scene that pineapple are circling the center of the scene.
I think it is fast enough to generate some motion blur. But it doesn't no matter how I tweet the para.
Could it be the SOPimport node setting? Or some hidden para I forget to tick?

Hi @digitalwu! To make this scene work properly, turn off velocity blur on the karma_preview LOP. There is no velocity information on the pineapple geometry, so telling karma to render velocity blur is basically telling it to not render motion blur. When you stop telling karma to use velocity blur, it falls back to using deformation blur, which is the correct type of blur to use given your input data which has time-sampled point positions.