Great tutorial! It clears up a lot of my questions about various effects.

Minor complaint: Focal length is size of the lens. Focal distance is the distance between the camera and the focal point.

Phones used to not be able to display shaders, but now they can. That means that the book of shaders should get a slight upgrade to be more friendly to a variety of screen sizes, pixel densities, and stuff like that. Not with the shaders themselves necessarily, but it'll really help out to have legible typography.

Not just moaning or complaining. This is something I know how to do pretty well,

Hi guys. Is there any documentation for the methods found in ShaderLang.h?
For example,what does TShader::setInvertY do?
I have just started so pretty sure I am going to have more questions related to the API.

In the Readme, there are confusing descriptions of the options.

One example:

sizeAttenuation - makes the line width constant regardless distance (1 unit is 1px on screen) (0 - attenuate, 1 - don't attenuate)`
lineWidth - float defining width (if sizeAttenuation is true, it's world units; else is screen pixels)

There's three things that are confusing here.

1. The name sizeAttenuation

Althougt code can be commented in the scripts, could be great to generate automatic documentation for the scripts and host it in the gh-pages branch of this repository.

In this way we can have a presentation web for the library and also the related documentation on how the API works.

I have checked DocFX and it seems it's possible to implement the pipeline for hosting the documentation as st