Iray Velvet

Does anyone have any insight into create velvet textures in iray?  SickleYeild intrigued me with the posting at deviant art:

PBR Weighted:

This one takes the values of the diffuse weight and glossy weight and adjusts them relative to each other.  It can be harder to get a good look with this but it is worth going into for some items.  DAZ uses it on their included velvet and satin shaders. I checked this, but this does not mean the diffuse and glossy weights must add up to 1.0; it's definitely possible to have the total value of both be higher than 1.

I would like to know the settings that will achieve the most velvety look. I would also buy any shaders that are velvetly. I am thankful for all the complex metallic and latex shaders, but have yet to see a set of velvet shaders.
The way velvet scatters the light can add some extra complexity to the scene.

Comments

  • fastbike1fastbike1 Posts: 4,078

    Take a look at these: http://www.daz3d.com/elegant-fabric-iray-shaders

    JGreenlees has a number of Iray shaders in the shop.

  • I'm actually almost finished with a Leather, Suede and Velvet shader preset set. The bit of free advice I can give is to turn "Share Glossy Inputs" to "Off", turn on Backscattering Weight, somehwere between .8 and 1.0 and put a similar or contrasting color in the Base Color and Backscattering Color. Then experiment with noise maps or short fiber maps in the Glossy Layered Weight, Backscattering Weight, and Bump.

    Good luck.

  • fastbike1fastbike1 Posts: 4,078

    @DestinysGarden  "I'm actually almost finished with a Leather, Suede and Velvet shader preset set"

    That's good to hear. I have several good leather shaders, but none that really do Suede. Another Velvet shader would also be nice (in addition to the 4 DG Iray shaders I already have). Keep 'em coming. : ))

  • LOL. Thanks! You keep buyin' 'em, I'll keep makin' 'em. laugh

  • Oso3DOso3D Posts: 15,056

    Is it just me, or is the silk effect of the default fabric shaders just... wrong? WAY too intense.

     

  • j cadej cade Posts: 2,310
    edited December 2015

    Well silk is a pretty broad category, its shinier than say crepe, but way less shiny than charmeuse. I'd more lable it "miscelaneous satin" personally

     

    *edit* Although I do find it off, but thats more to do with the lack of anisotropy and bumpiness

    Post edited by j cade on
  • j cadej cade Posts: 2,310

    It (and the velvet) also use backscattering, too. which I mostly hate. Backscattering is very fiddly andeven worse when you aren't usin a full scene or hdr.

     

    (i'm also personally of the opinion that you can't actually convincingly simulate velvet without using hair particles) And thats not getting into silk velvet, which I have never seen done at all.

    .

    .

    .

    I really like fabric

  • Oso3DOso3D Posts: 15,056

    I do, too. While cheesecake annoys me a bit, I find myself drawn to depicting women mainly to get cool outfits and hair to display. (It's DOABLE with men, just tends to be more limited)

     

  • Oso3DOso3D Posts: 15,056

    Here's an attempt: http://willbear.deviantart.com/art/Woman-in-Red-Velvet-Dress-578629854

    I'm not sure that's velvet EXACTLY, but it's in the ballpark.

    I used DestinysGarden's suggestions... backscatter, glossy, noise maps in bump, the works.

     

  • You got a nice sheen on that Will. I'm thinking it looks like felted wool, and yes you are in the same ballpark as velvet.

    I agree with J Cade that you really need fiber particles to get velvet bang on, especially for close up. And silk...well... silk can be anything from super transparent to thick as burlap, reflectively shiny to hardly any luster at all, and everything in between. Much depends on the weave and finish.

    I also like fabric, heh.

    I made a map for you guys. Play around with it in the various glossy, backscattering, and bump channels in conjunction with other maps.

    velvetforumshare.jpg
    800 x 800 - 505K
  • Oso3DOso3D Posts: 15,056

    Nice map, thanks! The map I have is a pretty basic noise map. Not really ideal, but I had it on hand. Heh.

     

  • scathascatha Posts: 756
    edited December 2015

    Thank you kindly, DG, will come in handy.  ;)

    And many thanks for the iray sci-fi surface lights shader 2 ... with max punches, it was a steal.  :D

    Post edited by scatha on
  • DogzDogz Posts: 898
    edited April 2020

    Im sorry, over time, I've tried all of the above and more and still I've yet to see a Velvet iray shader thats anywhere close to being on par with those possible under 3d delight and other render engines.

    In short, all iray velvet Ive seen either suffers from being too metalic or too emissive. Now It can look pretty convincing when rendered on lone sample sphere or slapped on to a dress wearing G8f with no background, but when loaded in to a full scene, mixed in with other materials. I can testify that it doesnt look right, it looks like metal or even worse; appears to be glowing like radiation or at least behaving /reacting to light in an alien way compared to all other surfaces in the scene. Not good.

    To be clear, Im not blaming any creator or vendor here, its not their fault, I think velvet may just be the technical achilles heel of Iray at the moment. Weird as you'd think with top coat and all, you'd beable to get something exceptional. I guess Nvidia are probably the only ones who can sort it

    But to any brave person who does take a stab at Iray velvet - you absolutley must test it in a full scene with other materials before signing off on it. But in the worse case, the metalic look is certainly the lesser of two evils, the emissive? solution for Iray velvet is truley horrible.

     

     

    Post edited by Dogz on
Sign In or Register to comment.