NURBS cameo button - Polyloop

jbshorty · 4th September 2006, 00:13

Hi. This is a NURBS solid polysurface model. Modeled and test rendered in Rhino 4.0 beta. Every detail is geometry, no displacement or bump mapping used in render. I was inspired by all the recent use of displacement sculpting, and wanted to see how far i could go using 100% NURBS...

Davidoff · 4th September 2006, 16:16

That's incredible. Very impressive technique.
Can you post some screenshots with the wireframe ?

jbshorty · 4th September 2006, 16:53

thanks davidoff. here is a wireframe. The extracted render mesh is about 600,000 polygons (the 12 small flowers added 400,000 to the model). It's really more than necessary for a good render, but i wanted to show very smooth details. I probably could have gotten excellent results with half of that polygon count...

Teyon · 4th September 2006, 17:38

Cool work. I met Bob McNeel at Siggraph, gave him a big ol' hug...pretty sure I freaked him out,

. Way to go with the model, it's good to see Rhino work in here!

zaxxon · 4th September 2006, 17:52

Nice display of Rhino nurbs. Good work, are you going to displacement sculpt the profile at some point? I think that it is an interesting decision
that the artist has to make now; that is how far to push the mesh detail, vs when to start the displacement brushing. Once again, nicely done.

jbshorty · 4th September 2006, 19:18

thanks for the compliments guys.

It's an interestng question when to consider a displacement sculpt vs. nurbs surfacing for high detail models. I'd done an alpha stamping in the silo 2 beta using the same cameo design. check the link below to see that screenshot. the silo model was an open mesh (no back face) and was about 328,000 polys. If i were to attempt displacement sculpting the same button model, i would probably be in the 6-7 million poly range because those little flowers would require a very dense mesh for a clean sharp stamping. The big advantage for me to use Nurbs is that the mesh is dense only where necessary. And i like my details to be clean and sharp. My future workflow will include sculpting elements in Silo, importing to Rhino and converting them into Nurbs objects. But i don't i will think export a meshed rhino model to sculpt in Silo because a mesh extracted from a polysurface doesn't make a nice even topology... Teyon, next year if you see a cactus dressed up like Bob McNeel, don't try to hug him. It's a trick!

http://www.silo3d.com/forum/showthre...alpha+stamping

marcello · 4th September 2006, 21:06

really fine work.. but I'm very very curious: I use the rhino4 beta, too, and don't know where is the displacement "function"... is it the grey scale?...

Sketchy · 4th September 2006, 21:44

How do you qualify for a Rhino 4 beta? Do you have to own Rhino 3 or earlier? I have the trial without expiration.

Teyon · 4th September 2006, 22:08

You have to own Rhino 3 to use the Rhino 4 beta. Rhino has always had a Heightfield from Bitmap generator, which can be used in conjunction with other features to simulate displacement. However, it does not have a true displacement painting option when last I checked.

jbshorty · 4th September 2006, 22:30

Thanks Marcello. Currently there is no tool for displacing an existing surface. I used the "heightfield image" tool to produce a displaced surface on the contruction plane (maybe this is called "grey scale" in the french version?). Then i trim away the unwanted areas and work the displaced surface into the model... There is a plug-in available for displacing a mesh surface within Rhino 3 (it doesn't work on nurbs surfaces), which can be found at www.reconstructivism.net . This is the personal website of David Rutten, before he started to work for McNeel. It's worth checking out his site, he has lots of really interesting plug-ins.

True, Rhino 3 had the heightfield surface generator. But R4 also has tools to morph the new surface onto a target surface, making a model such as this button much easier to develop...

4th September 2006, 00:13	#1 (permalink)
jbshorty subhuman infection Join Date: Jul 2006 Location: in a dirty sock Posts: 1,412	NURBS cameo button Hi. This is a NURBS solid polysurface model. Modeled and test rendered in Rhino 4.0 beta. Every detail is geometry, no displacement or bump mapping used in render. I was inspired by all the recent use of displacement sculpting, and wanted to see how far i could go using 100% NURBS... Attached Thumbnails

4th September 2006, 16:53	#3 (permalink)
jbshorty subhuman infection Join Date: Jul 2006 Location: in a dirty sock Posts: 1,412	thanks davidoff. here is a wireframe. The extracted render mesh is about 600,000 polygons (the 12 small flowers added 400,000 to the model). It's really more than necessary for a good render, but i wanted to show very smooth details. I probably could have gotten excellent results with half of that polygon count... Attached Thumbnails

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4th September 2006, 16:16	#2 (permalink)
Davidoff I'm Batman (in 3D) Join Date: Dec 2004 Posts: 884	That's incredible. Very impressive technique. Can you post some screenshots with the wireframe ?

4th September 2006, 17:38	#4 (permalink)
Teyon Go Team Venture! Join Date: Jul 2005 Posts: 191	Cool work. I met Bob McNeel at Siggraph, gave him a big ol' hug...pretty sure I freaked him out, . Way to go with the model, it's good to see Rhino work in here!

4th September 2006, 17:52	#5 (permalink)
zaxxon NURBS Booleans are your friend Join Date: May 2006 Posts: 117	Nice display of Rhino nurbs. Good work, are you going to displacement sculpt the profile at some point? I think that it is an interesting decision that the artist has to make now; that is how far to push the mesh detail, vs when to start the displacement brushing. Once again, nicely done.

4th September 2006, 19:18	#6 (permalink)
jbshorty subhuman infection Join Date: Jul 2006 Location: in a dirty sock Posts: 1,412	thanks for the compliments guys. It's an interestng question when to consider a displacement sculpt vs. nurbs surfacing for high detail models. I'd done an alpha stamping in the silo 2 beta using the same cameo design. check the link below to see that screenshot. the silo model was an open mesh (no back face) and was about 328,000 polys. If i were to attempt displacement sculpting the same button model, i would probably be in the 6-7 million poly range because those little flowers would require a very dense mesh for a clean sharp stamping. The big advantage for me to use Nurbs is that the mesh is dense only where necessary. And i like my details to be clean and sharp. My future workflow will include sculpting elements in Silo, importing to Rhino and converting them into Nurbs objects. But i don't i will think export a meshed rhino model to sculpt in Silo because a mesh extracted from a polysurface doesn't make a nice even topology... Teyon, next year if you see a cactus dressed up like Bob McNeel, don't try to hug him. It's a trick! http://www.silo3d.com/forum/showthre...alpha+stamping

4th September 2006, 21:06	#7 (permalink)
marcello 3D bible Join Date: Oct 2003 Location: paris Posts: 2,061	really fine work.. but I'm very very curious: I use the rhino4 beta, too, and don't know where is the displacement "function"... is it the grey scale?...

4th September 2006, 21:44	#8 (permalink)
Sketchy Box modeling Join Date: Jul 2006 Posts: 317	How do you qualify for a Rhino 4 beta? Do you have to own Rhino 3 or earlier? I have the trial without expiration.

4th September 2006, 22:08	#9 (permalink)
Teyon Go Team Venture! Join Date: Jul 2005 Posts: 191	You have to own Rhino 3 to use the Rhino 4 beta. Rhino has always had a Heightfield from Bitmap generator, which can be used in conjunction with other features to simulate displacement. However, it does not have a true displacement painting option when last I checked.

4th September 2006, 22:30	#10 (permalink)
jbshorty subhuman infection Join Date: Jul 2006 Location: in a dirty sock Posts: 1,412	Thanks Marcello. Currently there is no tool for displacing an existing surface. I used the "heightfield image" tool to produce a displaced surface on the contruction plane (maybe this is called "grey scale" in the french version?). Then i trim away the unwanted areas and work the displaced surface into the model... There is a plug-in available for displacing a mesh surface within Rhino 3 (it doesn't work on nurbs surfaces), which can be found at www.reconstructivism.net . This is the personal website of David Rutten, before he started to work for McNeel. It's worth checking out his site, he has lots of really interesting plug-ins. True, Rhino 3 had the heightfield surface generator. But R4 also has tools to morph the new surface onto a target surface, making a model such as this button much easier to develop...