V-ray Fur

[Free Agent_cg]

would this be possible in sketchup???

[dalomar_cg]

Re: V-ray Fur

I'm not sure what the state of V-Ray Fur is in terms of availability in the SDK (if it is in there it is definitely one of the most recent things to be added). That really isn't the issue though because geometry in SU is a mad house. The way SU chooses to store and structure its geometry is very bad, which makes geometry operations (like displacement) a nightmare to get working correctly and efficiently. Basically, we need to find a better way to navigate through the minefield that is SU geometry. So that means its definitely a ways off...Sorry for the bad news.

[Free Agent_cg]

Re: V-ray Fur

no thats fine, i was just wondering if it was possible and wether it would work like displacement, i know in 3D Max you can see the strands before it renders it, unlike displacement in sketchup thats flat untill rendered...

[dalomar_cg]

Re: V-ray Fur

Well Max's support for plugins is significantly more robust than SU's is. Basically SU (AFAIK) doesn't have any way to tie into any display pipelines and add custom drawn objects. This means that we are VERY limited in what we can actually pull off as far as displaying the things that we would like (hence Vray-only materials have less then stellar viewport feedback). This is all the name of the game as far as SU is concerned. The program wasn't really built for all of the things that we're trying to do with it, so thats why its like walking though waist-deep mud.

As far as how it works, it is like displacement, but its not like displacement. Both fur and displacement are what's referred to as dynamic geometry. This means that both operations will be created on the fly when they are need to render pixels, trace reflections, and what not. Thats mostly where the similarity ends though. Displacement will actually subdivide the mesh and move the vertices based on the image and parameters described. Fur doesn't mess with the underlying geometry, but requires stable normal/texture coord information to do well (something thats a challenge in SU). Also, there are a number of geometry calculations that need to be done during render time, so I don't know how much of that is our responsibility for or is handled by the Vray SDK...beyond this, it becomes a question for Joe or even Vlado.

[40th]

Re: V-ray Fur

"The program wasn't really built for all of the things that we're trying to do with it"

i think i got to experience some of it for instance:
when i apply material on an complicated geometry object (towel), SU processing it endlessly (until i run out of patience and close it totally)

[thomthom]

Re: V-ray Fur

Basically SU (AFAIK) doesn't have any way to tie into any display pipelines and add custom drawn objects.

I believe that LightUp for SketchUp hooks into the OpenGL rendering of SketchUp. http://www.light-up.co.uk/ Once LightUp has done it calculations and display the rendered scene in the SU viewport you can see as you orbit that it will jump back into regular SU view style until you stop orbiting where as it will return to the LightUp style. I'm not 100% sure what's going on in the background there, but I think Adam, (the maker of the app) has find a way to hook into SU's OpenGL. From his posts at the forums and YouTube videos he seem to mention something about LightUp replacing the SU view. Don't know if it's anything ASGVis can make use of for V-Ray, but might be worth looking into?

[dalomar_cg]

Re: V-ray Fur

Thanks Thomthom...I'll take a look and also ask the developers if they know specifically whats available. From a quick look though, it almost seams as though it just overrides the SU viewport and gives it back when moving around. Who knows though.

[thomthom]

Re: V-ray Fur

The author is very active at the SketchUcation forum. http://www.sketchucation.com/forums/...profile&u=1200 I was going to ask him if it really hooks into OpenGL or not. LightUp's current version require OpenGL 2 enabled graphics card. The first versions was Ruby powered, but now it got a native backend on PC and OSX.

I'll let you know if I can confirm that it's an OpenGL hook or what it is.

[ckosio_cg]

Re: V-ray Fur

we will see on sketchup 7...they're been quiet for a long time..I think they're working on something..hopefully. ;D

[nomeradona_cg]

Re: V-ray Fur

we will see on sketchup 7...they're been quiet for a long time..I think they're working on something..hopefully. ;D

sketchup 7 (sorry FA out of topic) lots of rumour that it will be release soon, but lots of secrecy when is the date. my only hope that it will adress millions of Poly.

as for Vray fur, hope that it will be!!!

[nomeradona_cg]

Re: V-ray Fur

FA you might want to see Damien stuff when he is bored
http://asgvis.com/index.php?option=c...0&topic=4810.0