vertex maps for splines?

[Janmansilver]

I would like to drive eg opacity of a spline rendered as hair via a vertex map, is this possible?

The scene gets too heavy if i have to sweep the splines to create real geometry.

[SSmolak]

I would like to drive eg opacity of a spline rendered as hair via a vertex map, is this possible?

You can try to set vertex map to fields and use spline as field with radius :

After that use this vertex as opacity in Octane nodes

[Janmansilver]

Thanks, but that's not what I'm trying to do. I want to control the spline itself with vertex map on the spline:

And then render the spline via the octane object using "render as spline (hair)" and then control eg opacity or color via the vertex map.

[Janmansilver]

So this is not possible with Octane?

[SSmolak]

Possible but it looks like famous word "limitation" should be used for weights on splines. Use Sweep instead with small radius :