Three.js: height map to mormal map

[bingomanatee]

Sorry if this is a Noob question - but is there a simple way to translate a height map into a normal map?

thanks

Dave

[robotsuperstar]

"Crazybump" will artificially create one. Normal Maps are typically created from an subdivided highres model from it's original source.

[alteredq]

There are tools for this:

http://code.google.com/p/gimp-normalmap/
http://developer.nvidia.com/nvidia-texture-tools-adobe-photoshop

[bingomanatee]

Thanks but I need to create one in JS/ dynamically.

[mrdoob]

There you go:
http://mrdoob.com/lab/javascript/height2normal/