Composite Gold Material

Hi list,
I have a problem with blending in a composite material for Rhino render.
With low percentage blend the composite material becomes black. But with 0% on the blended materials, the base material is normal.

With a “Blend material” this works fine, but with “composite materials” not.

I try to blend gold, silver, copper and aluminum in one material.

Please advise.

What effect are you trying to achieve?

Make alloys for jewelry design:

Found the solution: The color of the base material has to be black, so it eat all light.
And you have to Add the materials. Blend does not works. Becomes black.

Goud legering.rmtl (31.7 KB)