Please note that the issue linked in my previous comment was fixed a while ago. For instance,
julia> using Makie, CDDLib, Polyhedra
julia> v = convexhull([0, 0, 0]) + conichull([1, 0, 0], [0, 1, 0], [0, 0, 1]);
julia> p = polyhedron(v);
julia> m = Polyhedra.Mesh(p);
julia> X = mesh(m, color=:blue)
Result:
