Arnold - motion blur with ass-files

#1

Hi.

I’m confused. Just to understand that right, when exporting to ass (testing with particles and exporting from naiad at the moment) I have to make sure to enable motionblur. So far so good.

But isn´t it possible later to testrender without motion blur? Even if I disable motion blur either in the options of the standin node or in render settings - the standin always render WITH motion blur - also, the motion blur settings in globals doesnt seem to have any effect on the ass-file (shutter etc.)

Is that supposed to work like that or is somethign wrong here? (Mtoa 1.0.0, Arnold core 4.1.3.2, Maya 2013)

Thanks

#2

We had the same with our partio reader for emp files. I used the velocity for the definition of motion keys for the particles. And if you define more than one key, motionblur is rendered - if you turn it on in maya or not. So it seems that the usage of motionblur is not a global switch as in other renderers but more hint for the renderer how to export the data.

So - yes, if you have exported ass files with motionblur, the keys are baked into the ass and the object will be blurred. And because the start/end shutter etc. is only used to define the export times, it has no effect on the ass file.

I found it quite conveniant to use the Naiad emp files directly via partio, so we could use it for krakatoa or any other renderer where we had a working point procedural.