Paul Smiths Fuzz for animation
I have had the pleasure of testing Paul Smiths excellent Fuzz for applying fur - great tool with comprehensible controls for grooming short fur. Unfortunately it looks like the strands orientation jitter when the generator surface is animated - deformation as well as SRT. It is set up for animation, so the strands stay on the deformed surface, but I have this jitter. Did anyone here succesfully find a fix for that? I did write to Paul BTW, but I guess he is busy, so no reply yet. After all this is a free (donationware)tool so I am certainly not expecting him to provide support :) It would be awesome if I could get it working, as it will be hard to redo the grooming with other tools , plus I have no time for looking into Kristinka or Melena. Cheers Morten
Re: Paul Smiths Fuzz for animation
have seen this on some production shots. because of massive scene size (as in: things happening a long way from the origin) we ran into limits of floating point precision. The solution was to offset the whole shot (parent whole scene under a null) so it was centered around the origin, and rebake all pointcaches. incidentally it was hair for feathers on birds – with the erratic random jitter they were kind of like flapping around in the breeze – and with the fixed and stable caches the hair/feathers ended up too stable to my taste. this was all long before ice and strands – but floating point precision limits still exist. if your scene is very big or very small (size not complexity), or action is happening very far from the origin – that could be the cause. From: Mirko Jankovic Sent: Friday, June 12, 2015 10:00 AM To: softimage@listproc.autodesk.com Subject: Re: Paul Smiths Fuzz for animation Maybe it is not only with fuz.. I'm actually having same issue but with softmiage hair. with animated character hairs jitter like changing places in every frame... so it maybe is not something from the fuzz... On Fri, Jun 12, 2015 at 9:55 AM, Alok Gandhi alok.gandhi2...@gmail.com wrote: I have no idea of the tool and I can be absolutely wrong but just out of the blue do zero out any epsilon values in the greater than / smaller than nodes (if any). On Fri, Jun 12, 2015 at 1:20 PM, Morten Bartholdy x...@colorshopvfx.dk wrote: I have had the pleasure of testing Paul Smiths excellent Fuzz for applying fur - great tool with comprehensible controls for grooming short fur. Unfortunately it looks like the strands orientation jitter when the generator surface is animated - deformation as well as SRT. It is set up for animation, so the strands stay on the deformed surface, but I have this jitter. Did anyone here succesfully find a fix for that? I did write to Paul BTW, but I guess he is busy, so no reply yet. After all this is a free (donationware)tool so I am certainly not expecting him to provide support :) It would be awesome if I could get it working, as it will be hard to redo the grooming with other tools , plus I have no time for looking into Kristinka or Melena. Cheers Morten --
Re: Paul Smiths Fuzz for animation
Maybe it is not only with fuz.. I'm actually having same issue but with softmiage hair. with animated character hairs jitter like changing places in every frame... so it maybe is not something from the fuzz... On Fri, Jun 12, 2015 at 9:55 AM, Alok Gandhi alok.gandhi2...@gmail.com wrote: I have no idea of the tool and I can be absolutely wrong but just out of the blue do zero out any epsilon values in the greater than / smaller than nodes (if any). On Fri, Jun 12, 2015 at 1:20 PM, Morten Bartholdy x...@colorshopvfx.dk wrote: I have had the pleasure of testing Paul Smiths excellent Fuzz for applying fur - great tool with comprehensible controls for grooming short fur. Unfortunately it looks like the strands orientation jitter when the generator surface is animated - deformation as well as SRT. It is set up for animation, so the strands stay on the deformed surface, but I have this jitter. Did anyone here succesfully find a fix for that? I did write to Paul BTW, but I guess he is busy, so no reply yet. After all this is a free (donationware)tool so I am certainly not expecting him to provide support :) It would be awesome if I could get it working, as it will be hard to redo the grooming with other tools , plus I have no time for looking into Kristinka or Melena. Cheers Morten --
Re: Paul Smiths Fuzz for animation
Shot in the dark here, but I always use the store strand groom from melena in my groom ice tree, and then have a simulated ice tree with restore strand groom. I'm doing my fur in houdini at the moment, so I'm a bit rusty on the workflow, but that's how I remember doing it last year. G On 12/06/2015 10:51, Morten Bartholdy wrote: Well this is very average scale and centered, as I am in the proces of rigging and applying fur to the elements. No legacy Hair either - only ICE, and no simulation for turbulence or the like. MB Den 12. juni 2015 kl. 10:43 skrev pete...@skynet.be: have seen this on some production shots. because of massive scene size (as in: things happening a long way from the origin) we ran into limits of floating point precision. The solution was to offset the whole shot (parent whole scene under a null) so it was centered around the origin, and rebake all pointcaches. incidentally it was hair for feathers on birds – with the erratic random jitter they were kind of like flapping around in the breeze – and with the fixed and stable caches the hair/feathers ended up too stable to my taste. this was all long before ice and strands – but floating point precision limits still exist. if your scene is very big or very small (size not complexity), or action is happening very far from the origin – that could be the cause. *From:* Mirko Jankovic mailto:mirkoj.anima...@gmail.com *Sent:* Friday, June 12, 2015 10:00 AM *To:* softimage@listproc.autodesk.com mailto:softimage@listproc.autodesk.com *Subject:* Re: Paul Smiths Fuzz for animation Maybe it is not only with fuz.. I'm actually having same issue but with softmiage hair. with animated character hairs jitter like changing places in every frame... so it maybe is not something from the fuzz... On Fri, Jun 12, 2015 at 9:55 AM, Alok Gandhi alok.gandhi2...@gmail.com mailto:alok.gandhi2...@gmail.com wrote: I have no idea of the tool and I can be absolutely wrong but just out of the blue do zero out any epsilon values in the greater than / smaller than nodes (if any). On Fri, Jun 12, 2015 at 1:20 PM, Morten Bartholdy x...@colorshopvfx.dk mailto:x...@colorshopvfx.dk wrote: I have had the pleasure of testing Paul Smiths excellent Fuzz for applying fur - great tool with comprehensible controls for grooming short fur. Unfortunately it looks like the strands orientation jitter when the generator surface is animated - deformation as well as SRT. It is set up for animation, so the strands stay on the deformed surface, but I have this jitter. Did anyone here succesfully find a fix for that? I did write to Paul BTW, but I guess he is busy, so no reply yet. After all this is a free (donationware)tool so I am certainly not expecting him to provide support :) It would be awesome if I could get it working, as it will be hard to redo the grooming with other tools , plus I have no time for looking into Kristinka or Melena. Cheers Morten --
Re: Paul Smiths Fuzz for animation
Well this is very average scale and centered, as I am in the proces of rigging and applying fur to the elements. No legacy Hair either - only ICE, and no simulation for turbulence or the like. MB Den 12. juni 2015 kl. 10:43 skrev pete...@skynet.be: have seen this on some production shots. because of massive scene size (as in: things happening a long way from the origin) we ran into limits of floating point precision. The solution was to offset the whole shot (parent whole scene under a null) so it was centered around the origin, and rebake all pointcaches. incidentally it was hair for feathers on birds – with the erratic random jitter they were kind of like flapping around in the breeze – and with the fixed and stable caches the hair/feathers ended up too stable to my taste. this was all long before ice and strands – but floating point precision limits still exist. if your scene is very big or very small (size not complexity), or action is happening very far from the origin – that could be the cause. From: Mirko Jankovic mailto:mirkoj.anima...@gmail.com Sent: Friday, June 12, 2015 10:00 AM To: softimage@listproc.autodesk.com mailto:softimage@listproc.autodesk.com Subject: Re: Paul Smiths Fuzz for animation Maybe it is not only with fuz.. I'm actually having same issue but with softmiage hair. with animated character hairs jitter like changing places in every frame... so it maybe is not something from the fuzz... On Fri, Jun 12, 2015 at 9:55 AM, Alok Gandhi alok.gandhi2...@gmail.com mailto:alok.gandhi2...@gmail.com wrote: I have no idea of the tool and I can be absolutely wrong but just out of the blue do zero out any epsilon values in the greater than / smaller than nodes (if any). On Fri, Jun 12, 2015 at 1:20 PM, Morten Bartholdy x...@colorshopvfx.dk mailto:x...@colorshopvfx.dk wrote: I have had the pleasure of testing Paul Smiths excellent Fuzz for applying fur - great tool with comprehensible controls for grooming short fur. Unfortunately it looks like the strands orientation jitter when the generator surface is animated - deformation as well as SRT. It is set up for animation, so the strands stay on the deformed surface, but I have this jitter. Did anyone here succesfully find a fix for that? I did write to Paul BTW, but I guess he is busy, so no reply yet. After all this is a free (donationware)tool so I am certainly not expecting him to provide support :) It would be awesome if I could get it working, as it will be hard to redo the grooming with other tools , plus I have no time for looking into Kristinka or Melena. Cheers Morten --
Re: Paul Smiths Fuzz for animation
I have no idea of the tool and I can be absolutely wrong but just out of the blue do zero out any epsilon values in the greater than / smaller than nodes (if any). On Fri, Jun 12, 2015 at 1:20 PM, Morten Bartholdy x...@colorshopvfx.dk wrote: I have had the pleasure of testing Paul Smiths excellent Fuzz for applying fur - great tool with comprehensible controls for grooming short fur. Unfortunately it looks like the strands orientation jitter when the generator surface is animated - deformation as well as SRT. It is set up for animation, so the strands stay on the deformed surface, but I have this jitter. Did anyone here succesfully find a fix for that? I did write to Paul BTW, but I guess he is busy, so no reply yet. After all this is a free (donationware)tool so I am certainly not expecting him to provide support :) It would be awesome if I could get it working, as it will be hard to redo the grooming with other tools , plus I have no time for looking into Kristinka or Melena. Cheers Morten --
Re: Paul Smiths Fuzz for animation
I'm not familiar with Paul's setup but he's a very clever and talented guy. If the jitter is just a few occasional pops, I'd check if any nodes are using a point reference frame (ICE attribute) instead of a poly reference frame (or a point normal instead of a poly normal). When sticking geo/particles to other surfaces I've found that the point reference frame is an interpolated result which can make things jitter on a deformation. The poly reference frame (or poly normal) locks to each polygon. I like the look of the point interpolation but when it causes problems I switch to poly. Beyond that emitting from deforming geo can also cause problems. I would suggest using a static object to do all the emitting/grooming and transfer that over to the animated mesh. Not sure how you're doing it now.
Re: Paul Smiths Fuzz for animation
Paul got back to me - caching the start frame and reading it back in per frame should solve it. Not exactly sure how to do the reading per frame though. Morten Den 12. juni 2015 kl. 12:44 skrev David Barosin dbaro...@gmail.com: I'm not familiar with Paul's setup but he's a very clever and talented guy. If the jitter is just a few occasional pops, I'd check if any nodes are using a point reference frame (ICE attribute) instead of a poly reference frame (or a point normal instead of a poly normal). When sticking geo/particles to other surfaces I've found that the point reference frame is an interpolated result which can make things jitter on a deformation. The poly reference frame (or poly normal) locks to each polygon. I like the look of the point interpolation but when it causes problems I switch to poly. Beyond that emitting from deforming geo can also cause problems. I would suggest using a static object to do all the emitting/grooming and transfer that over to the animated mesh. Not sure how you're doing it now.
