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Hey all, I hope someone can shed some light on this. I'm trying to understand the motion blur in the rop alembic OUT node. I need to make them match with XSI, that why I need to understand them better. Here what I think, correct me if I'm wrong... - If I check the "use motion blur" box : Samples : 0 Linear interpolation with no motion blur sub-frames. (ie frame: 5 / 6 ) Samples : 2 2 sub-frames (ie frame: 5 / 5.33 / 5.66 / 6 ) The Shutter also give me interrogation: The XSI default is set to 0.25 - 0.75. Do I need to make my ROP alembic Shutter match with the one from XSI ? thanks Doum After some test, I've clarified the meaning of these setting and make them match in XSI(arnold). - If I check the "use motion blur" box : Samples : 2 mean 1 sub-frames and the next frame. (ie frame: 5 / 5.5 / 6 ) Samples : 4 mean 3 sub-frames and the next frame. (ie frame: 5 / 5.25 / 5.5 / 5.75 / 6 ) For the shutter part, it's seam to clip between the values you give. Sorry, I'm not able to explain in number what it would gives, but I let it to the default values 0-1. I hope it could help someone