XStream and Hair

[pjz99]

How many hairs (not guides) are in the hair object, and what are the settings for the hair material, particularly thickness?

[abdelouahabb]

hi
i think this is an external render engine, so the best thing that you can do is to convert the hair as a polygon object, then you apply a material with "hair polygon" in luminance.

[ooo]

Hi

I'm not sure what would be the reason to know the amount of hairs? As a test it just happens with a standard cube and grow hair command. Everything default.
The scene that I want to render has about 60.000 hairs and a hair thickness of 0.4 cm. It renders great in Cinema within seconds.

And I don't think it's an external renderer. It is the Vue scene that is being rendered by C4D's AR2. But I'll give your suggestion a try!

And to describe my render (It's on a different machine so no screenshot here) I see all the hairs so there is something rendered, but it's very vague, pale and transparent, while the C4D render is just very solid hairs (no transparency at all).

Thanks for your help guys!

odo

[rocketsledd]

Heya Odo. Sounds like the same thing that happens when you render hair with sketch and toon enabled. The hair is there, but it's useless as it's nearly totally washed out. As such, I'd guess it's a similar incompatibility with the Vue renderer and the most-likely solution is to either render in separate passes and comp or, as mentioned, generate polys for the hair. Or perhaps the new 10.5 update would yield better results (a longshot I'm sure).

A side question about XStream: Do you find that the Vue scenes render much slower in Cinema than they do in Standalone? I've been using Infinite for a while now and recently downloaded the XStream demo but found this longer render time to be a bit of a drawback. They are nearly identical in preview mode but in anything of better quality, the Cinema times are much higher regardless of whether I use the automatic or vue render options.

Just curious.

J.

[ooo]

Ok I made a screenshot to show.
The polygon hair option didn't work either :(

[AdamT]

Hi
And I don't think it's an external renderer. It is the Vue scene that is being rendered by C4D's AR2. But I'll give your suggestion a try!
odo

Actually what xStream does is composite the AR render on top of a Vue render, using various tricks to share reflection/refraction/transparency info. And then Hair is really a separate rendering system on top of AR, so it doesn't surprise me that there are issues.

[JTalbotski]

I've found that if there are any volumetric effects in the scene, the hair will render like that. Volumetric lights or fog or glow, etc. You may have to disable the Vue volumetric effects from the bg scene.

Jim

[ooo]

Thanks Rocketsledd!

Yes XStream is indeed quite slow when rendering in C4D. The standalone is as fast as Infinite. E-on still has some work to do before this works like it should.

And thanks for remarking about the S&T similarity. I think I have no option than to composite my Hair in post (or ditch Vue). Maybe I'm doing something wrong with the conversion to polygons. What would be the best way?

Thanks again!

odo

And thanks Adam for explaining the Vue rendersystem. Wasn't aware of that.

And Jim, thnaks for pointing me to that. I'll check the volumetric effects. I'm for now using a very simple backgroud, but as you canassume the reason to use Vue is to add as much vegetation as possible and a good looking atmosphere.

[rocketsledd]

In the Hair object>Generate tab>Type Pulldown choose the Type that best fits the shape you're trying to produce. I'd guess a circle in this instance but you might be able to get away with Flat or Triangle and save yourself some polys.

I think you have to use a standard material for color and such at that point but I'm not entirely sure about that.

And thanks for the renderspeed confirmation...although I was hoping I was just doing something wrong. A lightwave friend of mine has been having the same problem.

J.

[rocketsledd]

snipped redundancy

[Continuumx]

...
And thanks for remarking about the S&T similarity. I think I have no option than to composite my Hair in post ...

My experience with Vue Xstream so far is to use the infinite side to render what you need and allow C4D to render the other stuff separately and then composite afterwards.

If you can get your object from C4D into Vue then you can have it interact with the vegetation, then render an alpha object mask from Vue to knock out the objects you prefer to render in C4D.

[ooo]

Thanks Tyrone! I was afraid of that too. But that should be the best and most flexible workaround I think.

And Rocketsledd: the circle option off course! I was messing around with spline and sweep. It is rendering now with XStream (slow, but workable). The polycount will rise dramatically so that might give problems when I have my ecosystem and full C4D scene set up. But hey this is at least something!

Thanks again all!

BTW: I just tried to see what happend when rendering with Ozone3 and the exact thing is going on.

odo

[abdelouahabb]

The polycount will rise dramatically so that might give problems when I have my ecosystem and full C4D scene set up. But hey this is at least something!


you can choose how many will be shwon in the editor and how many they will be subdivised.

[kvb]

I wouldn't hold your breathe for a fix. It's been a known problem since at least V5 pre-release, and it hasn't gotten a fix. It seems to go funky anytime the hair is put in front of any Vue element. If your hair is fully backdropped by c4d elements, it should render fine, but how often is that gonna happen:shrug:... get used to workarounds I guess:D Never did try Rocketsledd's workaround. I'll have to try that myself.

Hope your project continues smoothly odo

kvb

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