Changing model texture

[Adaethus]

I know how you can change a model's texture (through this tutorial), however I need something more subtle, something like Grom Hellscream's Stand Second animation where the chaos skin is overlayed on top of the normal green skin smoothly rather than abruptly swapping.
Basically I need a smooth morph animation for a custom hay model, like hay -> infected hay.

Any idea how to do this?

 

[GhostWolf]

How about...do the same exact thing like the model that you already know does the thing you want to do?
A layer that is normally not visible, with linear alpha interpolation in your selected animation.

 

[Adaethus]

How do I do linear alpha interpolation?

 

[GhostWolf]

Add the infected hay layer to your material that contains the normal hay layer.
Make the alpha animated.
Put in values.

If you don't know how to do it, just look at the Hellscream model and how it is done there (find the material that contains 3 layers, and check the 3rd one).

 

[Adaethus]

Oh turns out I forgot to add the first frame of the morph animation under the animated alpha thingie... >.>

Thanks for the help, it works now ^^