Thanks Frank , My goal with this code is 'to subtract 1 shape from another shape' , so I added these lines ...
(* RegionPlot3D generates a Graphics3D object, not a region ! *)
objMesh = DiscretizeGraphics[object];
cutoutMesh = DiscretizeGraphics[cutout];
region = Fold[RegionDifference, objMesh, {cutoutMesh}];
(* Use RegionMember to turn this into inequalities: *)
ineqs = RegionMember[region, {x, y, z}];
All is good till here and this last line fails ...
contourRegionPlot3D[ineqs, {x, -101.60, 101.60}, {y, -101.60, 101.60}, {z, 0, 129.43}, Mesh -> NoneBoxRatios -> Automatic, PlotRange -> All, Boxed -> False, Axes -> False]
results : Mesh::ilevels NoneBoxRatios -> Automatic is not a valid mesh specifications.
Any ideas why 'contourRegionPlot3D' fails here ?