Hey there.

A while back there was a pretty big discussion about rendering Fur.

One of the things pointed out was the textured_hair shader's Specular tab didnt seem to work.

I've tried it many times and agree i cant get any specular response.

I was wondering if this is still the case or not pr am I using it wrong.

-andrew

still buggy it seems

yes, i'd love to see a fix for this
plus some optimizations for fur/PBR…

j

Try to use “Shade curves as surfaces” on the render/dicing tab on the fur asset.

Yea, i still get no response.

Has there been a response from Support ?

Rob

Just trying to help,

Specular worked for me if I render the fur as geometry, have you tried that?

Yeah i don't email/bug submit anymore. I'm usually doing something wrong or thats how it was designed/intended.

Edit/ mzigaib i can only find the option you pointed out earlier “Shade curves as surfaces”, which still doesnt work but also changes the look of the fur.

Where is the “render the fur as geometry” option? And could you possibly upload a simple scene of it working?


Cheers

When you turn on “Shade curves as surfaces” it's exactly what happens.

It changes the looks of the fur because now he is calculating the lighting according to the each fur surface, you get more information on the lighting over the fur inclusive specular.

I believe that you can make you fur looking like however you want, you just have to adjust the Shader.

But yeah if you already have look on your fur before you render as surfaces it's going to be different but like I said you can adjust you fur to make it look like before, just take in consideration the different information that it is calculating now.

I hope it helps.

Right, but that really counter intuitive.

I think it works perfect for things like tinsel

http://forums.odforce.net/index.php?/topic/12099-reflective-hair/page__hl__tinsel__fromsearch__1 [forums.odforce.net]

BTW the fur specular VOP isnt broken, the material is either broken or there is a problem in its construction because i can render fur with a specular highlight with a simple (and very limited VOP setup).

Ive tried dozens of ways to rip out whatever is broken in the hair shader but it still doesnt work.

I ran into this a while ago and sent sidefx my solution but never heard back from them. Maybe I'm doing it wrong but I would disconnect the hairnormal from the hairspec node in the textured-hair material and it seems like it works.

My two cents

Mike

wywait
I ran into this a while ago and sent sidefx my solution but never heard back from them. Maybe I'm doing it wrong but I would disconnect the hairnormal from the hairspec node in the textured-hair material and it seems like it works.

My two cents

Mike

I think you're right! Thanks for the info.

The result I got here is the same than turn on “Shade Curves as Surfaces”.

I didn't compare the render time thou.

One other thing. We found that if we rendered the base object as phantom. Then rendered the base object without the fur and comp'd the two together we could cut the render times in half.

Yep it does appear to work once the hair_normal is disconnected from the hair_spec.

And yea there are a bunch of hair threads on odforce on rendering fur, the phantom trick is one that i think i will be using quite alot.

I haven't used houdini in a couple years, and I can't believe I'm being bit by this bug tonight, two years later.

I've tried disconnecting the hair normal and ‘shade as curves’ but I'm still getting nothing :?

–edit–
I was able to work around this by replacing the hairSpec with a regular specular node.

You can also use H12 with the new physical Hair model and be happy as a lark.

Cheers SESI