Compute normals from displacement map in three.js r.58?

Question

I\'m using the normal shader in three.js r.58, which I understand requires a normal map. However, I\'m using a dynamic displacement map, so a pre-computed normal map won\'t

Answer 1

What I was describing above is called a "bump map" and it comes as a default with the three.js phong shader. I combined the normalmap shader with chunks of the phong shader responsible for bump mapping:

http://meetar.github.io/three.js-normal-map-0/bump.html

Though the normals are a bit noisy they are basically correct.