How Do I Animate A Sheet Of Metal Corroding?

[stephenlindley]

Hi, hope someone can help me. I have a project where I need to animate a sheet of metal corroding and breaking apart over time. I am thinking of using blend shapes to get the sheet to fracture and curl back, but am not sure how to get a decent looking texture that corrodes as the sheet twists - any help would be greatly appreciated. If you can think of a better way to get the sheet to break apart that would be cool too. test render here

[joojaa]

make 3 testures

1 corroded
1 black and white how to animate corrosion ramp
1 noncorroded

make blend node

connect coorroder in slot 1 and noncorroded in slot 2 then connect the bw corrosion ramp trough a set range node to the blender attribute and then key the ramps min max values to move form one extreme 0 to the other 1 with a slight gap between min max (say max is min + 0.05)