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Re: Kristinka Hair Tests

Posted: 05 Mar 2010, 09:23
by Hirazi Blue
Wow, simply wow! :-o :-bd

Re: Kristinka Hair Tests

Posted: 05 Mar 2010, 13:08
by rray
look hot ! thanks for adding to the thread Anto

testing testing .. (I dont usually get past the testing stage ==)
"frozen" ( artsy alert :) )
RayKrH014.jpg
RayKrH014.jpg (86.87 KiB) Viewed 5800 times
light rig with 64 dir. lights with volume shadow maps

Re: Kristinka Hair Tests

Posted: 05 Mar 2010, 13:39
by Hirazi Blue
Well, I am a sucker for artsy... ;;)
(and your last picture has been promoted to the si-gallery! ^:)^ )

Re: Kristinka Hair Tests

Posted: 05 Mar 2010, 17:12
by milanvasek
nice! you have a lot of interesting stuff here. i have to try these tools too one day :)

Re: Kristinka Hair Tests

Posted: 05 Mar 2010, 21:03
by Ahmidou
Hi Reinhard
Even if your pictures are tests they are looking really good!
I didn't had time to try Matheus compounds, but I know that actually segments size are in screen space?
Do you have any idea on how to deal with this and camera animations?
I know you can link it with camera distance, but it a trick and there's also the focal !

A

Re: Kristinka Hair Tests

Posted: 06 Mar 2010, 10:19
by rray
Thanks! Yes why mental is using pixels for strand units I don't quite get either, probably needs fixing . I don't know any way either around this except the workarounds you mentioned.
Also what needs fixing that hair lit from the side hardly casts any shadows (The hair segment billboards stay oriented to the camera, not to the light when tracing the shadow)
..and that rasterizer bug that attributes sometimes get garbled with >10000 strands :o3
Cheers for putting the picture in the gallery Hirazi!
RayKrH015.jpg
RayKrH015.jpg (85.02 KiB) Viewed 5690 times

Re: Kristinka Hair Tests

Posted: 08 Mar 2010, 11:18
by mirkoj
These looks really great!

I was wondering, Anto, if it would be possible for you to make a nice video tutor or something to get us fast into process?
Being a bit low with time it is hard to get into more details but I would love to check this hair more. I've downloaded some version a while ago and never get a chance to play with it really. Some video tutorial that can put us into speed with tool would be really fantastic. I know it is a lot and take a lot of time but..
I would love to implement that hair in my projects and spread it around but it is hard to start learning and testing something in the middle of project with deadline ;)))
Keep up the great work and I really hope that we will see more of your hair around. Well not YOUR but.. you know what I mean :)))))

Re: Kristinka Hair Tests

Posted: 08 Mar 2010, 21:19
by Mathaeus
Hi there,

As you probably noticed, images in this gallery were created by RRay, not be me :) I added only one...

The first on my todo list, is to finish Node Reference that RRay already started - especially I would like to add a few explanations about nodes. Also, small updates to existing tutorial. Then I planning to play with Eric Mootz's plugins that I already bought, but didn't had a time for them :)

Now seriously, I hope there will be another tutorials.

Cheers

Re: Kristinka Hair Tests

Posted: 09 Mar 2010, 14:28
by rray
Working on a more diffuse hairline. This is still much too dense
RayKrH016.jpg
RayKrH016.jpg (106.46 KiB) Viewed 3653 times

Re: Kristinka Hair Tests

Posted: 12 Mar 2010, 19:37
by rray
Experimenting with weight maps--
this WM controls hair length and density
this WM controls hair length and density
RayKrH19vp.jpg (95.92 KiB) Viewed 3493 times
ICE tree
ICE tree
ICEtree.gif (68.16 KiB) Viewed 3493 times
Resul,
Resul,
RayKrH19.jpg (131.94 KiB) Viewed 3493 times

Re: Kristinka Hair Tests

Posted: 14 Mar 2010, 20:58
by rray
RayKrH20.jpg
RayKrH20.jpg (168.12 KiB) Viewed 2995 times

Re: Kristinka Hair Tests

Posted: 15 Mar 2010, 00:50
by scaron
these are amazing... keep em coming!

Re: Kristinka Hair Tests

Posted: 16 Mar 2010, 16:45
by izze
Hey rray, can you please share more information about linking the strand size to camera distance? How to go about that? The hair I have looks great until I pull the camera back, then it gets thicker. Thanks!

Re: Kristinka Hair Tests

Posted: 16 Mar 2010, 18:46
by miga
rray wrote:Experimenting with weight maps--
Image
That one looks really nice!

edit: Oh, quoting images doesn't work; I'm talking about the curly short black hair

Moderator edit: go to the image properties, copy the image url & place it inbetween [img] tags... - HB

Re: Kristinka Hair Tests

Posted: 16 Mar 2010, 21:37
by rray
Thanks Steven, I will continue the spamming^^

izze, I've never done this but try something like this.
The hair will have to get thinner when it's further away from the camera. There's usually a ^2 somewhere in the equation when it comes to distance/size relationship but I don't know the exact math.
I would try 1/(ctr_dist_cam(emitter_nurbs)^2) as a factor for the hair thickness.
Also if you intend to modify the camera's fov, I would work this in as a factor as well.
So unless there's something fundementally wrong with my maths here (probably is :ymblushing: ) you would set something like 1/(ctr_dist_cam(emitter_nurbs)^2) * (1/Camera.camera.fov) * 5 as the expression for "size" in kH_Emit_Guides (try different values for the "5" depending on the hair thickness you want)

miga, thanks!

Re: Kristinka Hair Tests

Posted: 17 Mar 2010, 16:35
by izze
Thanks for the info. Great tests!