I'm just trying to set the color of a material at runtime. The C# docs are sparse.

MaterialOverride.Set("albedo_color", new Color(1f, 1f, 1f));

CodePudding user response：

That should be (tested):

((SpatialMaterial)MaterialOverride).AlbedoColor = new Color(1f, 1f, 1f);

You would get NullReferenceException if you let SpatialMaterial uninitialized. You would get a InvalidCastException if it isn't a SpatialMaterial (it could be ShaderMaterial).

It happens that MaterialOverride is defined as Material, and there are a few classes that extend (inherit from) Material. Namely: CanvasItemMaterial, ParticlesMaterial, ShaderMaterial, and SpatialMaterial. And, of course, AlbedoColor is a property of SpatialMaterial.

So C# does not know which of these MaterialOverride actually is, which is why we cast. There are other ways to cast in C#, see Casting and type conversions (C# Programming Guide).