clear all; close all; clc;

% numbers are arbitrary

cube=zeros(11,11,11);

cube(3:9,3:9,3:9)=5; % Create a cube inside the region

% Boring: faces of the cube are a different color.

cube(3:9,3:9,3)=2;

cube(3:9,3:9,9)=2;

cube(3:9,3,3:9)=2;

cube(3:9,9,3:9)=2;

cube(3,3:9,3:9)=2;

cube(9,3:9,3:9)=2;

H=vol3d('Cdata',cube,'alpha',cube/5) %what is alpha?

figure;

plot3(H.cdata(:,:),H.cdata,H.cdata);