Cheen Velvet - but no shadows???

[Jake-L]

Fresnel multiplied with noise (in both diffusion and luminance channels) + oren nayar shading mode has done th e trick for me. Specularity can be added to taste.

Something like here (sorry about the "sofa") ;)

[Triker]

I think thee were some velvets done in the fabric challenge a while back. The shaders are available on the Maxon site for down load.

[dan22]

Many thanks, guys, for replying so soon.

JakeL, I have taken your advice and built a shader with those settings, and a bit of extra noise on a larger scale as it is a kind of rough, "natural" velvet...and I think it works really well!

For future reference for other users, I attach another image, with the C4D velvet "JakeL" -type shader on most of the sofa but with the bolster and one loose cushion left in Cheen to compare. I think Jake's one works better, not least because it accepts shadows.

Those Bhodinut shaders are fascinating, but have their limitations, I guess - layering further maps being one of them.

Triker, I did actually d\l all those fabric shaders - thanks for reminding me - but nothing like trying it for yourself from scratch...

Thanks again for your help and advice.

Cheers,

D.

[Linds]

I made a velvet shader based on a Tut I found somehere, and ran into thw same problem with the shadows, or lack of.

Any chance you could post the shader you came up with?

Cheers

linds

[dan22]

Hi Linds, it's built pretty much as JakeL's instructions, Fresnel multiplied by Noise in the Diffuse and Luminance channels, plus some Colour...but check your PMs and I'll send you something..

Cheers,

D

[laurent]

Nothing to do with limitations of Bhodinut shaders, Its normal since your are choosing to saturate your material with Fresnel, it doesn't respond to illumination but to your camera position. Sorry, you'll have to be more creative and find something else than just the obvious.

[urban-rebellion]

"Those Bhodinut shaders are fascinating, but have their limitations, I guess - layering further maps being one of them." you can layer as many maps as u want. if ur using the layer shader then each channel can have a layer shader in there...and in them etc. same goes for Fusion.
dont kow if thats helpful or not. ;-)

[dan22]

"Those Bhodinut shaders are fascinating, but have their limitations, I guess - layering further maps being one of them." you can layer as many maps as u want. if ur using the layer shader then each channel can have a layer shader in there...and in them etc. same goes for Fusion.
dont kow if thats helpful or not. ;-)

Thanks, Urban, that is helpful - didn't think of that, but not sure if that would allow shadows to be accepted by Cheen. Might give it a try, though I've built my own shader now, and moved on to the next thing...

Laurent above explains why Cheen won't accept shadows which is very interesting -
OK, I suppose Cheen was a bit "obvious", but then again, why not? I mean, a Cube primitive is obvious, but I'd still use it to build a cube!

Anyway, I refer anyone else who is interested to JakeL's post above, with a good way to make a velvet material.

Thanks for all advice.

Cheers,

D.

[laurent]

Sheen, is a big fresnel shader an object with a sheen shader is visible without light try it. Cheen is a way to control light bounce from the shader independently the light source. Depending your settings you’re asking your cheen shader to ignore illumination (light position) to get that cool fresnel effect but at the same time you’re surprised that it cannot catch shadows properly. You can experiment with sheen until you control it, you could use only a dab of fresnel in a regular shader or did you try to play with gradients in the specular color? Cool effects can be derived from it, and the shader will better respond to shadows or you can place lights that only emit specularity and only have the sofa in the scene tab. There are a lot of possibilities my dear friend.

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.