Redshift hair rendering (for Feathers)

[cudarsjanis]

Hi guys,

Any idea how I could to pass Cd point attribute to RS Hair shader? or any other point attribute.

Cd works only as prim attribute on curves.

I have done it with particles and primitives with ParticleAttributeLookup, but it doesn`t work on hair curves.

Weird thing is that @width works perfectly, by default. That is why I think I should be able to use any other point attribute that I create as well.

Any ideas?

 

RedshiftHair.hip

[Sepu]

I cant look at the file right now, but have a look at this

https://www.redshift3d.com/forums/viewthread/22890/

[cudarsjanis]

31 minutes ago, Sepu said:

I cant look at the file right now, but have a look at this

https://www.redshift3d.com/forums/viewthread/22890/

Thanks Hernan,

but I got this working as well, Cd as prim attribute. But then you cannot get ramp from bottom to tip. just one color for each hair

I would like to have control over color per point as we need to render feathers and look dev is gonna come from houdini with Cd attribute.

Cheers

Janis

[cudarsjanis]

I`ve found out this is a limitation for Redshift, currently curves don’t support point attributes. They only support attributes and UV coordinates at the primitive level, one value for all the curve points.

 

But...

https://www.redshift3d.com/forums/viewthread/25582/

Pinkmoonllc: "I did have my own work around, however. I imported Cd and multiplied it by the RS Ramp Node, which I left as white. See attached image. (requires uv vertex attr in sops)"

Will have to try this.

[cudarsjanis]

On 11/5/2019 at 12:59 PM, cudarsjanis said:

Pinkmoonllc: "I did have my own work around, however. I imported Cd and multiplied it by the RS Ramp Node, which I left as white. See attached image. (requires uv vertex attr in sops)"

Will have to try this.

I`m having 0 luck with this one unfortunately.

Here`s my .hip, if anyone want to play around with it or have some better idea.

Cheers

Janis

RsHairCdTest.hip