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Hair is funny but...
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These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Hair is funny but... // Archive: Tech Forum
Post by Wigand // May 16, 2007, 7:41am
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Wigand
Total Posts: 462
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why the rendered hair is flat? |
Post by splinters // May 16, 2007, 8:03am
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splinters
Total Posts: 4148
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Check the hair profile in the hair settings, it can be set to circle, line (or profile?) which may mean the realtime view is a bit misleading. If this does not help then maybe post your settings...:) |
Post by Asem // May 16, 2007, 1:19pm
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Asem
Total Posts: 255
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I get the same and I have it set to a circle profile and the profile is 32. I tested with the 3 types and I'm still seeing a flat result. I did try to apply a vray shader to it (matte really doesn't seem to work the way it should). |
Post by Mike // May 16, 2007, 4:31pm
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Mike
Total Posts: 121
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It must be the shader/settings you're using. Try something else in reflectance channel. |
Post by Jack Edwards // May 17, 2007, 4:55am
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Jack Edwards
Total Posts: 4062
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Did you try smoothing the normals?
6124
-Jack. |
Post by Wigand // May 17, 2007, 7:37am
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Wigand
Total Posts: 462
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So, here are two pictures of 'hair'. Ok you say it is not hair, but I think the problem is the same for hair. If you want to have a special reflection like round hair, it is not possible with the circle parameter because the render is flat. I tried the star parameter and you see its not the matter of these parameters. I think it is a shader problem. But where can I change the shader for the hair to get rounded hair?
p.s. The normals are smoothed. |
Post by Heidi // May 17, 2007, 3:59pm
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Heidi
Total Posts: 335
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I posted here: http://forums1.caligari.com/truespace/showthread.php?t=2981 on how to change hair material.
It looks like yours is rendering flat with the circle profile because you're using autofacet or faceted when you're applying your material. The 'circle' profile for hair is four-sided, so to make it look smooth when rendered you need to use 'smooth' when you apply your material.
This was rendered from the modelling side using Lightworks.
If you are rendering with vRay, you need at least one light to provide specularity. I'm checking a vRay render now. It does look like vRay renders the hair geometry as flat even when I get specularty. I'll check it out and try to see what's going on. :)
Here are the results I'm getting so far. I can get vRay GI to make the hair look round (I increased the number of sides of the hair's circle profile from 4 to 8), but I don't have the lighting dialed in yet to provide the specularity. |
Post by Burnart // May 17, 2007, 6:07pm
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Burnart
Total Posts: 839
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Again a very educative simple render - thanks Heidi. (When my disk arrives from Caligari I'll be playing with hair first!) |
Post by Wigand // May 18, 2007, 1:22am
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Wigand
Total Posts: 462
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Thank you Heidi
Your demonstation is convincing :jumpy: |
Post by splinters // May 18, 2007, 1:48am
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splinters
Total Posts: 4148
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Wow heidi, you are giving me ideas for stuff I have struggled with for ages. In Harold Bike, I had to render Harold driving off the edge of a cliff and needed that grassy cliff edge look...if only I had waited for 7.5.
Still, not pulished yet so time to go back and re-do it. I will post my results.
Should be fun reworking old projects with new features. Cheers Heidi..:D |
Post by Heidi // May 18, 2007, 2:47am
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Heidi
Total Posts: 335
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Thanks... I'm glad I could help. I'll try to find more time today to play around with the GI lighting to get both the roundness and specularity going for you.
Splinters, I love your books. Be sure to show us what you come up with. :) |
Post by mykyl1966 // May 18, 2007, 3:47am
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mykyl1966
Total Posts: 221
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Heidi, What are your settings for the hair in that image. The thickness etc I mean. Looks excellent so far.
Cheers
Mike R |
Post by Steinie // May 18, 2007, 5:19am
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Steinie
Total Posts: 3667
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Yes, where exactly are you changing the numbers? I can only put a check mark next to "show changes" (as I recall since TS is not in front of me) I tried to change in LE and in the Stack. A screen grab could help.
I couldn't change settings while I was designing this one.
http://forums1.caligari.com/truespace/showthread.php?t=2985
So the hairs are all the same. Your example shows larger root diameters which I would like to try. Also the multi bi-color on each hair is caused by shader or light? |
Post by Heidi // May 18, 2007, 6:04am
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Heidi
Total Posts: 335
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In the panel stack on the right of the default layout. If you click on Default, you are taken to the advanced panel. There you can adjust the number of sides of the hair profile. This says 4. For the GI test I increased it to 8. You can also adjust the thickness of the hair at the root and at the tip. And you can specify the number of texture segments to apply to each hair. I specifed 1 but it defaults open to 32.
The material on the sample I showed is a bitmap gradient that shades the hair from tip to root.
Here's the screen grab of the control panel you requested and....
I'm attaching a zip of the basic scene I used for the test (this was the setup I used for Lightworks and the workspace) and a copy of the bitmap gradient. :) |
Post by Steinie // May 18, 2007, 6:21am
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Steinie
Total Posts: 3667
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Thanks Heidi for everything! One small part of TS and it's delivering so much enjoyment! |
Post by mykyl1966 // May 18, 2007, 10:26am
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mykyl1966
Total Posts: 221
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Heidi, Thank you very much for that. One thing that stood out to me though is Truespace doesn't seem to have a simple gradient material to apply. I dont mean the two color gradient that it starts with either. lol. Weird. Is that why you had to do it as an image texture.
Cheers
Mike R |
Post by Heidi // May 18, 2007, 1:10pm
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Heidi
Total Posts: 335
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Thanks guys, I'm glad I could help :)
The two-color gradient that is part of the hair tools is a horizontal gradient that wraps around the hair. I wanted the effect of having a different color on the tips of the hair.
You can also get some interesting effects by making the hair like a tube where the tip and the root are the same thickness and then apply a texture and alpha map. |
Post by trueBlue // May 18, 2007, 3:14pm
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trueBlue
Total Posts: 1761
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It is possible with the Gradient Bitmap (Blend) script located in the
Objects - Script objects library. Just exchange the Gradient Bitmap with the above and re link. Enter inside your object that has hair applied and then inside the Head Hair node to make the exchange. Then delete the Gradient Bitmap node. |
Post by Heidi // May 18, 2007, 4:13pm
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Heidi
Total Posts: 335
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Cool!... thanks for the info Trueblue :) |
Post by Leif // May 18, 2007, 4:32pm
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Leif
Total Posts: 276
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Thanks for all the tips.
How to turn off gravity (without stiffen the hair) or change gravity vector? |
Post by Heidi // May 19, 2007, 7:54am
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Heidi
Total Posts: 335
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The only manipulation of gravity in the hair panel is the degree of softness. With the tools there is the softness brush for additive softness. There is also the blow dryer for applying localized directional gravity.
To be honest, I haven't tried applying the physics tools to hair (applying a different physical attribute) or editing environmental gravity.
One way to disable gravity altogether and 'freeze' your hairstyle is to right-click on the hair and convert it to a mesh. Doing that makes it an independent object and it's no longer influenced by the object it was created on. It's also no longer editable as 'hair'. |
Post by Leif // May 19, 2007, 8:03am
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Leif
Total Posts: 276
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Well!
Thank you Heidi :) |
Post by marekk // May 22, 2007, 8:34am
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marekk
Total Posts: 10
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The only manipulation of gravity in the hair panel is the degree of softness. With the tools there is the softness brush for additive softness. There is also the blow dryer for applying localized directional gravity.
Exactly. The direction hair are pulled towards can be influenced by hair blowdryer locally.
To be honest, I haven't tried applying the physics tools to hair (applying a different physical attribute) or editing environmental gravity.
Due to performance reasons, there is no real physics in hair, therefore it will not work. |
Post by richardmedia // Jun 19, 2007, 11:26pm
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richardmedia
Total Posts: 8
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I already created some characters in TS6.6. I tried to add hair to the characters, sometimes it works perfectly, sometimes it does not.
For instance, I applies hair and then if I moved the object in Model, the hair moves and I can never move it back again.
And I have the memory issue. I have three characters (with hair on it ) on the screen, when I tried to manupilate the object, the memory will drop suddenly, the system will then halt.
Can anyone tell how can I tackle this problem ? My main memory is 2 GB, configuration is XP pro, due core 2.4 G.
I tried to reach technical support of Caligari, but they don't revert. |
Post by jayr // Jun 20, 2007, 1:39am
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jayr
Total Posts: 1074
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Would it be possible to add keyframes to hair in the future? It doesn't seen to work now but that could be a nice way to compinsate for lack of dynamics if we could use the hair syling tools to give the impression of dynamics. |
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