Image texture on face vertice 3D Model

I'd like to texture a 3D model described by faces and vertices with an image.

Therefore I tried with the MATLAB method surface like this:

% definition of faces and vertices above

n = length(vertices)/3;
X = reshape(vertices(:,1),3,n);
Y = reshape(vertices(:,2),3,n);
Z = reshape(vertices(:,3),3,n);

img = imread('image.png'); % mandrill image
surface(X,Y,Z,...
    'Cdata', img,...
    'FaceColor','texturemap',...
    'EdgeColor','none',...
    'FaceLighting','gouraud')

But this doesn't really work as my 3D Model has lots of 'empty' faces:

Same happens using the method warp like this:

warp (X,Y,Z,img)

Is this a MATLAB bug or am I doing something wrong?

Answer 1

[Walter Roberson]

If you have empty faces, then nothing can be drawn there.

Perhaps you should use boundary() https://www.mathworks.com/help/matlab/ref/boundary.html with a shrink factor, in order to get the outside layer connections (like a tight-fitting bounding box) and texture on top of that.