tstex
Not quite sure what you are trying to achieve.
I'm going to assume that you have created a SHOP surface definition using a VOPnet. After that I'm not quite sure. This: ch(“/shop/material1/vopsurface1/output1”) makes me concerned that you are trying to call a surface shaders output from another nodes parm - which is not possible.
What exactly are you trying to do?
yes, i got carried away w/ “proceduralism” and tried to fetch the output of the SHOP and put it into the color parameter of the OpenGL tab. (edit: I thought it was working as the color that was being output was the same as the default color of one of the ring node's color parameters. unfortunately, i didn't quite catch that the same is achieved by setting r = 0).
(i left the message rather than delete it for future amusement and edification.)
the hope comes from the way the VEX Super Material appears to work. is there a tutorial on getting an OpenGL / viewport shader to approximate (preview) what will be rendered (in realtime)?