Rendering

Synchronize Render Color

You set up the viewport colors with care — and then the render comes out with different ones, because display color and material color are two separate things in Rhino. This command reconciles them: the material color of the selected objects is changed to match their display color, so the render looks like the viewport you approved.

If an object has no material assigned, a new material is created and assigned to the object’s layer.

Steps

Select the objects whose display colors should become their material colors.

Command-line option

AllLayers — applies the display colors of all layers to their layer materials in one pass; layers without a material get a new one in their display color.