Here is a little pack of 7 mel scripts creating simple shading networks useful for compositing.

To create the shader simply drag and drop the corresponding mel script in Maya viewport, or load it in script editor and then install it in a shelf using provided icons. 

SimpleZ_SHD



Simple Zdepth useful to add Zblur in your compositing package. You can tune the Zdepth in the extra attributes of the shader.  


CustomZ_SHD



Same as SimpleZ, you can tune the Zdepth in extra attributes of the shader but you can also tweak the shape of the gradient using the ControlRamp.  Useful as mask on a defocus node in your compositing package.  







TriiTools_SHD



Shader outputing three different kind of information :

Red channel = Z depth
Green channel = Y Height
Blue Channel =  Falloff

In the extra attributes of the shader you can tune the value of the Zdepth, the starting and ending point of the Y Height (useful to add ground haze, for example, in your compositing software) and the aspect of the falloff.









Fallof_SHD



Shader to fake fresnel effect in compositing. You can tweak the gradient using ControlRamp. 



UVs_SHD




Simple Shader outputing geometries UV's geometries. No control. Useful to remap objects in compositing software.  Need to be rendered to 32-bit float.



NrmPass_SHD



Simple Shader outputing Normal of objects in screen space. No control. Useful for 2.5D relighting. Better to be rendered aliased and then to deal with the anti-aliasing in your compositing software. 


PositionPass_SHD



Simple Position Point Pass Shader, the RGB value of each pixel represents its position XYZ in 3D space.   Useful for 2.5D relighting.  Need to be rendered in 32-bits float and better to be rendered aliased. 






eXo. 2011.
henri.deruer [at] gmail.com
http://exorea.blogspot.com/