Which method to section objects and have surfaces as red after cut

we have all seen those sectioned engines etc where anything cut is painted red.

How best can this be done in Rhino ?

My object on a black layer.

I tried for creating a surface as boolean split then extractSrf (copy yes) and placed that on a red layer, but it went grey as soon as deselected, tried bringForward and also BringToFront but no success.

Then tried DupEdge and hatch as solid on red layer but it was ‘mixing it’ with the grey surface (seeing red and grey) and BringToFront wouldnt overcome this.


Hi Steve - you can use a ClippingPlane, and set the display mode to use a specific color for showing clipped ‘fills’