Character Creator: changeing the Mesh.

Is it possible to add sliders to the GUI which allows the player to change the mesh of a base character within specific boundary’s like in Tera or Mass Effect -I highly doubt they use different meshes for each time you move the slider, so their must be a more efficient method?

Please help, I imagine this could be of help to others as well.

you could adjust the scale of the part of the mesh(i think its transform.localScale or something like that), it would help if your character had bones because then you could just scale the bone i think, im not sure if that works though.