How can I create this image?

[Ameer Hamza]

It is much easier to create these objects in a 3D graphics modeling tool, such as blender: https://www.blender.org/, export the mesh as STL file, and then use stlread(): https://www.mathworks.com/help/releases/R2020a/matlab/ref/stlread.html to load it in MATLAB. It is certainly possible to create these shapes in MATLAB using patches and surfaces but that the solution can become complicated, and it cannot be applied to each general shape. For each shape, you will need to use a different technique.

Answer 1

[Star Strider]

Try this:

[X1,Y1,Z1] = cylinder;
X2 = bsxfun(@times, X1, [1.2; 0]);
Y2 = bsxfun(@times, Y1, [1.2; 0]);

figure
Ax = gca;
surf(X1, Y1, Z1, 'FaceAlpha', 0.5)
hold on
surf(X2, Y2, Z1+max(Z1(:)), 'FaceAlpha', 0.5)
hold off
Ax.Color = [1 1 1]*0.7;
Ax.GridLineStyle = 'none';
Ax.XAxis.Color = 'none';
Ax.YAxis.Color = 'none';
Ax.ZAxis.Color = 'none';
view(-40,20)

Experiment to get the result you want.