Re: pointvelocity to drive motion vectors on geometry - does it work?

Do you mean you're getting in camera 3D motion blur? If you're using mip_motion_vectors and you have motion blur turned on (shouldn't need that), you should be rendering with the shutter set to 0 (look under optimization). This will prevent in camera blur from rendering. In my test

Re: pointvelocity to drive motion vectors on geometry - does it work?

Just thought I’d get back on this subject – as it’s only a partial solution. with usermotions you can influence the motion vectors allright, (using mip_motion_vectors) but it also adds actual blur – which renders the motion vectors useless. I’ve tried with and without motion blur in scene and

pointvelocity to drive motion vectors on geometry - does it work?

Hi, I’m using the mip_motion_vectors output shader. My non-simulated particle cloud (sticking to a surface) shows up black which makes sense I guess. No worries, I’m looking up the PointVelocity at the surface and saving this on the particles – and magically the motion vectors are fixed and

RE: pointvelocity to drive motion vectors on geometry - does it work?

Hi Peter - I have gone through similar issues to do with Fur - you are right grabbing poitvelocity off geometry works fine for point clouds etc. BUT it seems that MB on geometry does not actually use the pointvelocity - cannot remember the details, maybe someone with renderer programming

Re: pointvelocity to drive motion vectors on geometry - does it work?

thanks – will have a look – this sounds just like what I need! From: Alan Fregtman Sent: Thursday, May 10, 2012 3:25 PM To: softimage@listproc.autodesk.com Subject: Re: pointvelocity to drive motion vectors on geometry - does it work? Yeah; for a UserMotion example, go to your XSI_SAMPLES