RefreshShade

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Refresh Shade

The RefreshShade command clears and regenerates the render mesh from selected objects so the shading refreshes.

Select surfaces or polysurfaces to re-mesh.
Their render and analysis meshes are re-created.

In Rhino 4 and earlier, editing surface control points would not cause the render meshes to update. The RefreshShade command can be used to update the render meshes. It is a rarely used command in Rhino 5 and later.
Use the RefreshShade command when objects have shading issues.
To delete render and analysis meshes from all objects in the model, use the ClearAllMeshes command.
To reduce the size of the model file, use the SaveAs command and check Save small.