Change Rhino material of layer

[isak.wadso (Isak)]

Hi!
I have materials in the material panel in Rhino, and I would like to add them to layers using Grasshopper. The Human plugin has a component to change material for layers, but it only works if some object in Rhino already has that material assigned. I believe this is because the material exists in the “MaterialTable”, but not the “RenderMaterialTable”. Is this correct, and is there a way to add them to the RenderMaterialTable?

I have tried to understand the structure in the API references, but I get confused about the different material tables!

(My workaround so far have been use Python in Grasshopper to run the Rhino command “RenderAssignMaterialToLayer”, but this breaks whatever other command is running so it does not work for me)

[dale (Dale Fugier)]

Hi @isak.wadso,

If you’re using Rhino 8, then you might look into the new Rhino Data types added to V8.

Rhino 8 Feature: GH1 Is Now More Than Just Geometry!

New Data Types Available in GH1 Have you ever been frustrated that you couldn’t bake geometry with custom attributes? What about display materials? Have you ever wanted to be able to use native Rhino materials in the Grasshopper display pipeline? How about importing files into Grasshopper - have you ever become discouraged when you try to import a CAD file and lose all of the basic metadata that is included with the geometry? The latest Rhino 8 WIP now has new data types and components which e…

Otherwise, you might review this thread and see if you can gleam anything useful.

Assigning RenderMaterial to Layers with a Python script

Hello, I am trying to edit the RenderMaterial property of the Layer Class, to automate the creation of layers with a preset material, color, linetype, etc. I got Layer.Color to work but for some reason I can’t really understand Layer.RenderMaterial() seems to not work. Not sure what is happening under the hood or where my code is not working. Happy to hear some advices. [image] doc = Rhino.RhinoDoc.ActiveDoc render_mat= Rhino.Render.RenderMaterial.CreateBasicMaterial(Rhino.DocObjects.Mat…

– Dale

[isak.wadso (Isak)]

Hi Dale,
Thanks for the reference. I adapted it to my case, and by setting the layer’s attributes directly with python, it works

I attach the grasshopper snippet if someone has the same problem later.
Change the render material of a layer.gh (7.3 KB)