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Captain Chaos
12-13-2012, 08:37 AM
Am I right in thinking that Alpha layers don't work with the channels in Fiber FX?

Captain Chaos
12-13-2012, 11:55 AM
Before I paste screen grabs here of what I'm trying to do, it's a nude figure. What are the rules?

sandman300
12-13-2012, 12:18 PM
Moderation Policy (http://forums.newtek.com/showthread.php?63919-NewTek-Discussion-Forums-Moderation-Policy)

If your talking about an actual photo, I would say either crop tastefully, or otherwise censure the image, this board is open to younger kids so think before you post. If your talking about a render, of a 3D object, its not a reel person so the line is a bit blurry, but I would say that as long as things are kept "professional" then there should be no problem. I've seen several artists post CG nudes before, usually they put something in the thread title so as to warn the viewer.

Surrealist.
12-13-2012, 12:51 PM
An image would help. But could you also be more descriptive with the problem?

Captain Chaos
12-13-2012, 12:58 PM
I'll err on the side of caution and make something just to illustrate the problem:

I made maps and checked them as surfaces. One to define the shape of the hair:
http://nort_comm.tripod.com/art/fiber/01.png

Then an Alpha layer so I'd only have hair on the front:
http://nort_comm.tripod.com/art/fiber/02.png

Then I tried the masks in Fiber FX. I got what I expected with the first mask:
http://nort_comm.tripod.com/art/fiber/03.png

But adding the alpha gave me this:
http://nort_comm.tripod.com/art/fiber/04.png

The actual rendering gave the same results:
http://nort_comm.tripod.com/art/fiber/moustacherend.jpg


Have I hit the limitations of doing it this way, or am I doing something wrong?

rdolishny
12-13-2012, 01:21 PM
I'll err on the side of caution and make something just to illustrate the problem:

I made maps and checked them as surfaces. One to define the shape of the hair:
http://nort_comm.tripod.com/art/fiber/01.png

Then an Alpha layer so I'd only have hair on the front:
http://nort_comm.tripod.com/art/fiber/02.png

Then I tried the masks in Fiber FX. I got what I expected with the first mask:
http://nort_comm.tripod.com/art/fiber/03.png

But adding the alpha gave me this:
http://nort_comm.tripod.com/art/fiber/04.png

The actual rendering gave the same results:
http://nort_comm.tripod.com/art/fiber/moustacherend.jpg


Have I hit the limitations of doing it this way, or am I doing something wrong?

I'd add the map on as a UV map, that way you have control over where the map goes (right now you're using Planar which has limitations like this one).

Looking at your proxy 3d model I can only imagine what you're working on. ;)

JoePoe
12-13-2012, 01:42 PM
If you don't want to do the UV thing, simply give the front half of the model a different surface name. That way the "mustache" will not show up on the back side.

Captain Chaos
12-13-2012, 02:08 PM
Thanks. I'll try renaming parts of the surfaces. I guess I'll have to seek out some tutorials on UV maps soon, though. BTW, rdolishny, the original model was a girl, but she looked like she had a poodle crawling out of her butt.

JoePoe
12-13-2012, 02:33 PM
Nice visual! :D

Don't forget to specify the surface name you're working with in the fiber effects panel.... instead of "all".

Surrealist.
12-14-2012, 03:53 AM
It would be a good idea to visit this channel:

http://www.youtube.com/playlist?list=PL10534F336C4EFDFC

Would be helpful.

Also nothing wrong with simply using a separate piece of geometry that is only used for the FFX and attaching that - similar to the skull cap idea - and then hide it. It can be driven from the same bones etc. In general this gives you more control rather than growing the hair from the same geometry as the model. You can place that geometry much easier where you want it.

Also I second using UV's. An alpha after all is only an image map and it will have the same limitations as any image map. UV's give you the best control.