Applying materials to splines

[Martin Bergwerf]

One Material! One Store Attribute. One Set Material Node. That’s all you need.

The Color disappeared, because you plugged the (B&W) Attribute in the Principled.

I do not really understand what your problem is, sorry; the Annotations didn’t help (but it’s the middle of the night for me, so that might have something to do with it 😉)

[Martin Bergwerf]

Just looked at your latest file…

That certainly works, but it seems clumsy to me.

[Forlorn Void]

It is clumsy, but it does what I want, multiple materials from selection on mesh splines converted from curves object. I don’t know how else to do it. If you have or someone else better idea I’m open to learn. If you convert it and in edit mode it correctly selects material and spline faces.

Edit: I forgot to delete the attribute nodes from shader before that’s why it was B/W

[Martin Bergwerf]

Well, I must admit, that I still don;t understand what you actually want and why my method didn’t work, but at least you got yourself a working solution 👍🏻

[Forlorn Void]

I wanted to select either material and it’s assigned geometry separately after it’s converted to mesh.

[Martin Bergwerf]

Ah, I see! Thanks for clearing that up!

When you use my method, you can, in Edit Mode (Vertex Select Mode), click on the IsRed Attribute to make it Active, and the go to Select > Select By Attribute.

(CTRL+I to invert that Selection).

[Forlorn Void]

Oh, so then I can manually assign the geo to materials.

[Martin Bergwerf]

You cannot manually change the Attribute, but you can make a new Material and assign the Selection to that new Material.

[Forlorn Void]

@spikeyxxx I’ve never done it like that. It says active attribute must have boolean type, after I converted it.

[Martin Bergwerf]

Click on the IsRed to make it Active (IsRed is already a Boolean):

I don’t say, that you can’t use your method, but I think it’s good to have more than one trick up your sleeve.

[Forlorn Void]

Oh there it is, thank you. I’ll have to see what is better once I export it. I think your approach is better because it’s easier to do more than two materials, and with separate geometry the tree will be hard to manage.

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