It is performance costly to make normal map animations?

Questions & Answers
1

I’ve created a jelly effect by alternating the normal map by a set of 12 different images…
It looks fine but, I don’t know if this is costly for the performance.

Thanks in advance for the help.

2

Rendering speed is the same as before since only one gets rendered per frame. (Assuming you just change the material between frames.) You need 12x the (video) memory, tough.