Fiber guides and Texture UV's

[mstewart152]

Is there any way to tell Octane to Use a color texture to dictate fiber color while using guides. I know this works when just applying fibers to a mesh with out using modeled fiber guides, but when you do it that way you can not apply any dynamics.

The end result I've been trying to get to is Dynamic colored fur on a character. I have so far been able to either or, but not both. If I could just get the color texture to dictate fiber color, I'de be good to go....

The closest thing i have gotten to work is the technique in the 2018 furry tail demo scene. It uses layout generated fibers with control guides, and octane can pull the color data... BUT...... and this is a big BUT, and Lightwave failure...... when you use those kinds of dynamic guides, from the (polygonize mixed) cammand in fiber fx, it is only usable on very small poly count models.... basically useless on any production model. Hense why I am back to using modeled traditional guides, because you can use a lot of them and sim them........ but then you get no color control........ need to bring these two worlds together!

an ideas?

Thanks!

[mstewart152]

basically all I need octane to do is be able to to use the color of the texture from UV'ed guides... so that it picks the color from the root of the fiber..... meaning the root of the fiber will be in the right UV space of the texture.... Is this possible somehow?

[juanjgon]

Hi,

How are you rendering the fiber guides? If you render them as polygonal hair, the UV value of the root vertex is going to be extracted by the plugin.
https://docs.otoy.com/Lightwave3DH/Ligh ... neHair.htm

Thanks,
-Juanjo

[mstewart152]

is this functionality confirmed to work in 2018?

[mstewart152]

cant seem to get this to work the same way in 2018. regarding root vertex pulling color data. Works in 2015 though.

[mstewart152]

found another bug in 2018.... when you try and open a subpatched model with fibers on it in IPR, it crashes......

Another crash is when you have fiberfx applied to a model, but have it unchecked in the panel so it doesnt load, when you open IPR it will crash.

these occur when using Polygonized guides... not sure about other modes yet.

[juanjgon]

cant seem to get this to work the same way in 2018. regarding root vertex pulling color data. Works in 2015 though.

Can you send me a test scene to reproduce this problem here? I'll try to check it here, but with your scene I could be sure that we are using the same workflow.

Thanks,
-Juanjo

[mstewart152]

here is a test scene... FIberfx is in-active... crashes when doing F9 render.

[mstewart152]

here is a fiber ball test using normal modeler guides, with uv's root vertex's..... can't get them to pick up texture correctly.

[juanjgon]

Sorry for the late reply. I'm still investigating the problems that you can see in the attached scenes. I hope to know more details soon.

Thanks!
-juanjo