How to correctly construct a PBR Material?

[tebjan]

The PhysicallyBasedMaterial class doesn’t have a constructor and if I create a normal Material and call Default() and then ToPhysicallyBased() it also doesn’t seem to do anything:

In Rhino it then looks like this:

Is there any way to enforce or construct a correct PhysicallyBasedMaterial instance in Rhino3dm via code?

[dale (Dale Fugier)]

Hi @tebjan,

I’m sure there is no way of creating these with rhino3dm. I’ve logged a wish for this.

https://mcneel.myjetbrains.com/youtrack/issue/RH3DM-150

– Dale

[tebjan]

Thanks for the answer. But here is this Material.ToPhysicallyBased() but it seems to be broken. Maybe that just needs a bug fix?

This project is related to these two requests:

How to load geometry from linked block files?

I added this as a feature request to rhino3dm at

Setting camera of Perspective viewport

Hi @seltzdesign, Doing this from openNURBS isn’t difficult. However, I can see there isn’t way of constructing a ViewInfo class from outside of core Rhino. I’ve logged this issue. https://mcneel.myjetbrains.com/youtrack/issue/RH-70610 – Dale

Would be nice if you could link these together… Thanks!

[fraguada (Luis Fraguada)]

Remind me in which language you are using rhino3dm?
I recently wrapped toPhysicallyBased() for js and py. I don’t recall when it was added for dotnet. In js you would do something like:

const redMaterial = new rhino.Material()
redMaterial.toPhysicallyBased()
redMaterial.physicallyBased().baseColor = { r: 1, g: 0, b: 0, a: 0 }
redMaterial.physicallyBased().metallic = 0.7
redMaterial.physicallyBased().roughness = 0.5
doc.materials().add(redMaterial)

I have not released a beta with this yet for js and py. If you need it for js and py, you can get a ci version here (next 15 days): rhino3dm ci

[tebjan]

@fraguada

Remind me in which language you are using rhino3dm?

I am using C#. I think it isn’t wrapped correctly or is just missing…

[fraguada (Luis Fraguada)]

In c# I can do this:

Rhino.FileIO.File3dm file3dm = new Rhino.FileIO.File3dm();

var material = new Rhino.DocObjects.Material();
material.ToPhysicallyBased();
material.PhysicallyBased.BaseColor = new Rhino.Display.Color4f(1, 0, 0, 0);
material.PhysicallyBased.Metallic = 0.7;
material.PhysicallyBased.Roughness = 0.5;
file3dm.AllMaterials.Add(material);

var oa = new Rhino.DocObjects.ObjectAttributes
{
    MaterialIndex = 0,
    MaterialSource = Rhino.DocObjects.ObjectMaterialSource.MaterialFromObject
};

var sphere = new Rhino.Geometry.Sphere(Rhino.Geometry.Point3d.Origin, 10);
file3dm.Objects.AddSphere(sphere, oa);

file3dm.Write("fileWithMaterial.3dm", null);