dynamic change mesh

if i have two man’s mesh(A,B),start A man’s sport,than change B man’s sport,but keep up action!How can i do!

Oooh, you’ll have to give me a bit more than that to work with!

What type of game is it, what action is taking place, what kind of change happens… ?

Unity have a demo “Character Customization”,which script code change apparel’s mesh!
and how can i just change the texture!

You can use renderer.material.mainTexture to set the texture used by an object. You can add several Texture2D public variables to the script and drag textures onto them in the inspector. Then, when you want to change textures, just assign one of these Texture2Ds to renderer.material.mainTexture.