I know a normal map is used to give a 3d model more detail than it really has. Useful for making detailed walls, bricks, rocks.
But is it ok for giving surface anatomy to a 3d model which would otherwise look very low polygone?
And if so, would it do anything for speed wise when running in the game engine?
My example, is making a detailed sculpted model, then taking the base mesh and baking the normal map onto it.