Thanks Raxx for rephrasing my question, that was exactly what I thought- 
the action of keyframing the skewing, scaling, or moving UV coordinates with it interpolating between each keyframe
. I've meant morphing just one picture/texture which is applied to object or the part of it- that could be useful for simulation of liquids (water,sweat,melting etc.). 
I watched your tutorial about the script and understood that I have to edit multiple instances of that picture with external program that can be applied to a .an8 file with your script, that worked quite good in you video but those codes look scary 

,I'll give it a try