Lights and Custom Shaders - Three.js - page 250

• A simple online shader editor can be found at http://shdr.bkcore.com/
Another great help can be the latest version of Firefox Dev Tools. This is a special
version of Firefox, which provides great debugging support and even includes a
shader editor that you can use to edit a shader program and directly see the
results. You can download this version from https://www.mozilla.org/en-US/firefox/
developer/ .
There is, of course, the khronos website ( http://www.khronos.org ), which is a great
resource to find out what a specific function actually does.
See also
• As a fragment shader is always accompanied with a vertex shader, it is good
to also understand how they work. In the Creating a custom vertex shader
recipe, we explained the steps you need to take to set up a custom vertex
shader.