I want to transfer the vertex indices from one mesh, to another mesh with identical topology, shape, size ect. As an example, I created two identical subdivided cubes. The only difference is that they do not have the same vertex indices. To demonstrate the problem I am having, I sculpted some smiley faces on to the cubes as shape keys. My goal is to have both shape keys applied to one cube at the same time. However, when I try to copy the shape key from the red cube to the green one, it doesn't work. I have tried Transfer Shape Key (left), which doesn't apply correctly. I have also tried Join as Shapes (right), which heavily distorts the cube. Is there a way I can change the vertex indices of the cube red cube to match the cube on the right?
I may be missunderstanding what you are trying to do here, wouldn't just making a copy of the Green cube in object mode be the easiest way to insure that both objects have identical vertex indices?
I thought it would be possible to Transfer Mesh Data from Green to Red cube. Object menu > Relations > Transform Mesh Data but I couldn't get it to work.
Tried with the Data Transfer modifier but again with no success.
That left the long way of transferring vertex indices : Link the data of the Red to the Green and then remove the link.
There must be a more elegant way of doing this :)
there you go ... an Addon, see comment above. Thankyou @R-800 :)