Tapering for VRayFur

[vlado]

You can simulate tapering of the fur strands for VRayFur if you map the opacity of the material along the strands, so that they are more transparent towards the tips:



Best regards,
Vlado

[Dynedain]

That's a great tip Vlado...

Does this work with the refraction map with IOR 1.0 trick for opacity? or only if you use the opacity slot of the material?

[vlado]

You can do that, of course, but in my test it was slower with refraction than with the opacity map.

Best regards,
Vlado

[jonnybefree]

nice!

are there any plans to implement styling in vray fur btw?

[trixian]

Ah, yes, whatever happened to that Vlado? I can clearly remember you saying that this was going to be implemented in the 1.5 final.
What happened?

[RErender]

Ah, yes, whatever happened to that Vlado? I can clearly remember you saying that this was going to be implemented in the 1.5 final.
What happened?

I still have shag installed, just for this one hope.

[vlado]

Well, it works, but it needs some more development time; I'll see if I can release something separately from V-Ray. It is essentially a vertex paint modifier, but designed to generate textures specifically for V-Ray fur.

Best regards,
Vlado

[egz]

That's a good tip, thanks!
Would you consider adding a totally flat geometry type as well? Basically just a plane with as many height segments as specified in the knots setting. The plane could have normal UV coordinates, and would be useful for doing special things like feathers, or for mapped grass cards for distant objects. I guess the challenge to work out is the orientation of each fur object around the z axis?

[flipside]

Re: Tapering for VRayFur

You can simulate tapering of the fur strands for VRayFur if you map the opacity of the material along the strands, so that they are more transparent towards the tips:

Best regards,
Vlado

Can anyone tell me how to "map the opacity of the material along the strands"?

thanks!

[egz]

Re: Tapering for VRayFur

You can simulate tapering of the fur strands for VRayFur if you map the opacity of the material along the strands, so that they are more transparent towards the tips:

Best regards,
Vlado

Can anyone tell me how to "map the opacity of the material along the strands"?

thanks!

You need to use the W mapping coordinates. So add a gradient ramp to the opacity slot of the fur's material, and change the mapping from UV to WU.

[deneb26]

cool tip. that's exactely what i need for an upcoming interior-shot.
thanks vlado.
ale

[egz]

Here's a quick samplescene if anyone needs it. (max 9/VRay 1.5)
Download

[flipside]

Hey torgeir thanks a lot!

[ene.xis]

thanks Egz!

[flipside]

Is it normal that when you put any texture into the diffuse slot, the rendering becomes very very slow? For example I swapped the gradient from the opacity to the diffuse channel. If I try another texture, even simple ones, it gets very very slow.