Basically the help button opens up the same help dialog as the help button in the standard AVS components (superscope/dm/...) with a Texer 2 specific tab along side the others. In case you didn't know, this is one of the new things in AVS 2.7.
Justin simply didn't implement any way for APEs to use this dialog until pre9.
Here's the text in the texer 2 tab:
Texer II is a rendering component that draws what is commonly known as particles.
At specified positions on screen, a copy of the source image is placed and blended in various ways.
The usage is similar to that of a dot-superscope.
The following variables are available:
* n: Contains the amount of particles to draw. Usually set in the init code or the frame code.
* w,h: Contain the width and height of the window in pixels.
* i: Contains the percentage of progress of particles drawn. Varies from 0 (first particle) to 1 (last particle).
* x,y: Specify the position of the center of the particle. Range -1 to 1.
* v: Contains the i'th sample of the oscilloscope waveform. Use getspec(...) or getosc(...) for other data (check the function reference for their usage).
* b: Contains 1 if a beat is occuring, 0 otherwise.
* sizex, sizey: Contain the relative horizontal and vertical size of the current particle. Use 1.0 for original size. Only works if resizing is on.
* red, green, blue: Set the color of the current particle in terms of its red, green and blue component. Only works if color filtering is on.
* skip: Default is 0. If set to 1, indicates that the current particle should not be drawn.
The options available are:
* Color filtering: blends the image multiplicatively with the color specified by the red, green and blue variables.
* Resizing: resizes the image according to the variables sizex and sizey.
* Wrap around: wraps any image data that falls off the border of the screen around to the other side. Useful for making tiled patterns.
Texer II supports the standard AVS blend modes. Just place a Misc / Set Render Mode before the Texer 2 and choose the appropriate setting. You will most likely use Additive or Maximum blend.
Texer II was written by Steven Wittens. Thanks to everyone at the Winamp.com forums for feedback, especially Deamon and gaekwad2 for providing the examples and Tuggummi for providing the default image.